Discovery Bank. Best practice is to Ignore and mess your Customer around

Two Issues: 1) I am unable to get credits passed when returning purchases - phoned your call centre a few weeks ago - was promised feedback - Ignoring YOUR customer is NOT feedback. Tried to return an item today - problem still exists. 2) Received an email offering an account "colour change", tried to accept, failed, phoned in, was told to update my app, updated app, problem persists. Last week I called in, was told the reason was that I have a bad credit record - I ABSOLUTELY DO NOT have a bad credit record, was transferred to credit department to be told I was in the wrong department, held on for feedback, got cut off. The only reason I may be defined as a bad customer is due to the fact that you levied 3 amounts of interest on my credit card account in March and April due to your own mess up that required 3 calls to get resolved. Somebody called back promising feedback shortly. I then received an email claiming that you had tried to call me. I did not even receive a missed call. Nobody has bothered to follow up - This seems to be your way of operating which is less than pathetic. Kindly deliver service to your paying customer.

I await a phone call