Bought In-App add-ons, but never delivered

I bought the "No ads" and "All tunings" add-ons to Fiddle Companion Sept. 2015, got my Apple receipt, but they werent installed. 3 emails to the developer Infinaut support group went completely unanswered. I had to get a refund from Apple after 3 weeks.

Kronplayer about Fiddle Companion, v3.2.0