I've used Scryptominers in the past for Potcoin and they were certainly legit, although they were being DDoS'd I did receive good service from them and certainly did receive my coins

My guess is that the confirmations are taking a bit longer for this coin and the pool says it needs 120 confirms to pay out. If you look at the transaction screen, it should show you all the blocks you've been paid for and are "unconfirmed".

You are most likely still getting paid for the work you are doing it is just taking a bit to confirm the blocks found.