Need some help with my link building strategy

Hey guys, I need some help with building backlinks and I have some questions:

1. My strategy is to buy articles on old sites with high DR/DA, mostly highly trusted newspapers from my country. I have different pages for the services that I offer. So, for service number 1 I used only 6 backlinks to get number 1 on google for the keyword that I wanted. Backlinks are linked to the specific page of the service. For service number 2 I used 10 links already and I am on the first page but at the bottom. Different backlinks for every service. Now I am thinking of buying the same backlinks that I bought for service number 1 as they seem to be more effective. If I will buy the same backlinks they will have any effect on services number 2 or are not that powerful considering that the domains are already pointing to service number 1. Should I continue with different backlinks, from different domains or go with the ones that I bought for service number 1?

2. The second one is that in the articles that I bought for backlinks there is no mention of my brand name and I have not used it in the anchor text. Will it help me with ranking in any way if I use my brand name in the article or even use it as an anchor text?

3. Some articles are marked as paid articles, should I buy this type of article or go only with the native ones?

Thanks!

1. Yes, you can get multiple links pointing to different landing pages from the same website, it can help you rank up.

2. You should use your brand name as anchor text in guest posts. Most natural backlinks point to the website's homepage and the brand name is generally the most common anchor text. You want to mimic that with your paid backlinks.

3. Native content is always better, but sponsored posts can still help you rank up. Their effect won't be as noticeable, but they're worth getting. Try to get a mix of both for your website.

Hope this helps!

Thanks for the info!