Underwhelming customer service and falsely advertised perks

I have been struggling to get my fuel spend cash back paid out for more than 6 months. It's 1 promise or excuse after the other. The latest is, although the Discovery system isn't working like it should ( I have swiped the fuel card at every transaction but not retained receipts - who keeps them!), that they are not able to utilize my transactions from my Discovery Credit Card or just pay out based on driving points if its such an issue. I have the odd retained receipt from the period being queried as well as receipts for the last 2 - 3 months but even that hasn't been paid. Rather than sort out the problematic system, they just ignore the requests.Discovery is certainly not the cheapest insurance provider, but I refused to change companies on multiple occasions because they were generally great with claims, and in my mind, worth the expense. This frustrating experience has really tested my loyalty and to be honest, I might just make the effort to get a comparable quote and move for better service. Perhaps the company has gotten too large and customer service is certainly on the decline.