VERY poor service and cut off telephonically 6 times

I cancelled my DSYV subscription with Nombo ref ***-I78 this apparently failed no reason given. Cancelled a second time Simon ref *** - i83. Subscription was deduced yesterday from my account with an elevated incorrect amount. Tried calling 6 times this morning to discuss this matter and was cut off each time and finally was told to hold on for 30 minutes due to high call volumes. 30 minutes is a ridiculous time to hold on for with no guarantee of getting through. If I do not receive a call on *** by this afternoon I will return the debit order and will not pay the disconnection fee either due to very poor service.