Worst support ever!!!

It’s impossible for me to restore my purchase. I bought the „FX Pack“ on my iPhone. I contacted the support and got several instructions. Nothing fixed my issue. Suddenly the developers stopped replaying my emails. I guess they’ve no clue. It wouldn’t be a big problem for me at all but I’d appreciate an answer what exactly the problem is/could be. What about the others? Does someone else have this problem???

sysnetarea about djay Pro, v1.0.2