Bad service

I've never had any problem with medihelp until I wanted to claim back. On the 14th of Feb 2018 I went to see my doctor and had to pay unfront and claim back. On the 21st of Feb 2018 I received the sms to say they've received my claim. After I received my email to say medihelp paid my doctor's part I called to ask when my money will be paid out and the lady said they didn't even see that they have to pay me so she send it back, a few days later I called again and the lady said no they send it back as a duplicate so she'll send it back AGAIN. after a few days I called again and this time the story was they wanted to reverse the money they paid my doctor and pay it in my account - I explained that they have to pay my doctor AND they have to pay me. So again after a few days I called and this time she said they pay out 3 times a month (10th, 20th and last day) so she said she'll push it to be paid the 20th of March 2018. Today (23rd of March) I called again and now the story is they waited for my banking details to approve because I changed my account number (I did this in the beginning of March and got confirmation on the 8th of March). This is bad service, I did everything correctly to claim back and because they made a mistake by not noticing they have to pay me, I have to struggle to get my money back.