Got to say, I used Supersonic for the sign up to betting sites offer (Did it for a Betfair account, a Ladbrokes account and a William Hill account).

The Betfair and William Hill ones credited my Tokens within an hour or so of completion. It took nearly 3 weeks to get credited for the Ladbrokes one and I did have to contact support - but they did eventually give me the Tokens, even though I had no screenshots as they said there was enough proof.

While it took time for the Ladbrokes one to come though, it did eventually - and on all three offers I have been paid out. (As a bonus I also won £40 overall too on the three accounts)

Seems like you have had some very bad luck with them.