Updating information leads to major ******up

I updated my details with Discovery. I got assured everything is in order. The next month Discovery put through a debit order for double my premium. I enquired and had to prove to them that I had been a member for years and get my bank to send them proof that they received the previous month's debit order. Then, because the double premium debit order was returned unpaid I had to EFT my premium. Then after five days, they refunded me one premium. Now they asked me to do another EFT for the same amount! It took 7 emails and sending proof of payment and at least 4 hours on the phone. No one listens at Discovery. And I am suspended due to no fault of my own. So disappointed.