I apologize in advance if incase I am being straightforward and realistic.
I have been buying TrustPilot reviews from various vendors here for years and over time, 95% of those reviews are deleted, usually within days.
how to post TrustPilot reviews that have high chances of not getting dropped.
Alright, so you've been buying Trustpilot reviews from various providers and 95% are deleted within a few days.
If incase you have been buying from just 1 or 2 providers and their reviews drop (get deleted) within a few days, then we could feel that there is a quality issue with these 1 or 2 providers.
However, in your case, you have been buying Trustpilot reviews from MULTIPLE providers and having 95% of the reviews deleted within a few days.
This means that it requires atleast a basic level of analysis to be done. What is happening NOWADAYS, is that various platforms are beefing up their algorithms in order to detect in a more efficient manner, anything spammy in nature. So, since 95% (it's a high %) of MULTIPLE providers' reviews are getting deleted in a few days, this means that Trustpilot has beefed up their algorithms in a drastic manner. Please bear in mind, this is NOT what I am claiming. This is just a logical analysis based on your real experience.
However, it is nice that you are confident enough to counteract the currently drastically beefed up algorithms of Trustpilot.
In order to attempt the same on your own, you will have to go for certain resources, or rather be ready to buy (pay for) certain resources. You will have to go for a good anti-detect browser and you can know which is a good one for your needs by trying them yourself. A few of them are Multilogin, Gologin, DolphinAnty, Incogniton, Adspower, Kameleo, Link Sphere, Ghost Browser, Lalicat.
You would also need 4G mobile proxies : there are hundreds of sellers of 4G mobile proxies, at BHW marketplace.
Once you have these 2 resources, you will then have to "farm" each browser profile of the anti-detect browser, so that you do not appear to be a spammy person signing up for Trustpilot. Farming browser profiles of and anti-detect browser can be dome manually or through part or full automation.
Then, you will have to have suitable docs with you in order to verify each of the Trustpilot accounts, because a verified Trustpilot account is more trusted by the Trustpilot algorithms as compared to a non-verified Trustpilot account, especially (NOWADAYS) for reviews.
Next, you will have to always on an ongoing basis, keep "farming" each of these verified Trustpilot accounts, so that whenever any of these (verified) Trustpilot account posts a review, then it appears to the Trustpilot algorithms to less likely be a spammy review. Do note that the "farming" of each of these verified Trustpilot accounts on an ongoing basis, cannot be automated, it has to be done manually.
There you go ... You are now all set ... You can now, on your own try to post Trustpilot reviews in the CURRENTLY best possible manner, which again does NOT guarantee that all reviews will not drop. 1% may drop or even 99% may drop, no one knows. But, what you now do know, is the CURRENTLY best or good method of trying to post your Trustpilot reviews.
You will have to try it all on your own, as per what you have mentioned.
Oh, and I forgot to mention, another useful resource for the task, is lots of caffeine, which can be got from drinking coffee, while you burn the midnight oil.