Buying link building and seo services from different people at same time ?

As my title mentioned, just 3days ago, I bought link building services from sam,
while in the same time, is it a good idea to buy from another person ? does that make the report losing it accuracy ?
and is it bad when there's suddenly so much backlinks for my websites ?

If your site is new then you should order one service at a time.

What do you mean will the report lose accuracy? The seller will send you a report of the links they built, nothing else.

Hi, thanks for replying
What's the suggested time to wait until next time I buying links building for best results and not being flag as spam ?

Wait first for the effect of the links you bought. If they produce positive results, then I don't see any reason why you should buy from a different link provider. Besides, I think it will be hard to troubleshoot your site once/if problems occur since you have multiple link-building sources.

Actually I mean purchasing different kind of services,
What I recently purchase were stuff like Web2.0 submission, article submission, edu links.
But I saw all the new sales thread having a service call "PBN" I'm not sure if this does the same as link building

if you look at what is happening when you buy a service you can buy multiple services at one time but the goal is that they are diversified. There are even times when such diversification can be beneficial and yet other cases where you could cause a negative effect. Most things that grow follow that rule -observe nature for instance the spacing of the branches on a tree. In most cases with SEO you hear about drip feeds and building links over time which is why googles updates are to seek out spam and duplicates and by far using tools or blasting a site with things like 10,000 backlinks in a day is way easier to spot due to the spike. Even when looking at reports the first thing that catches the eye are the spikes whereas a gradual growth pattern looks more like going up a mountain it starts at a smoother incline in the beginning. However, you may want the blast off approach as when launching a new product. The day of it going live or 'opening day' should spike. The ultimate goal is to think diversity and blue oceans.

Thanks for that reply, I learned something