I would also like to tag someone who I think could vouch for me: @OKamilTan
I do not exactly know what you both have agreed on but when it comes to the pure delivery of songs @Hewlett was always extremly fast and reliable.
We have bought extremly many songs of him to resell and at first they all got accepted without problems. However with the recent growth of spotify botting it is now hard to get beats approved. We have never had an agreement with AMGI that they need to be accepted on spotify. That was our risk. I do not exactly know if you have the same kind of agreement with him or not.