Unpaid claims and contractual breach

I took my dog for her vaccinations on the 27th of November 2017. My card rejected the vet was kind enough to let me go and sort ou the issue. After a month payment still hadn't come through. After contacting oneplan repeatedly. Then I paid cash and submitted my invoice along with the slips that showed my payment had been rejected. Oneplan still hasn't refunded me and for my efforts placed a block on my card that I cannot load a new claim. It is a year later and the matter still hasn't been resolved. I haven't seen a cent of the money I paid nor has the block on my card been lifted. Yet they still get their installment every month... I am at witts with these people I get shunted from pillar to post every time I contact them and everyone apologizes yet nobody does anything about the situation. More than a year, countless phone calls, emails, online chats yet nobody does anything. I have had enough. I will be cancelling my policy and will make sure I do not recommend oneplan to anybody else. Years of paying and they can't even pay out R615 and then prevent me from taking my dog for her vaccinations as they just decided to block my card so I cannot load another claim. Pathetic absolutely pathetic