Webafrica disgusting service

For two months (April/ May) Webafrica double debited my account. I contacted then and they asked for my statements to check if that was the case. They admitted the mistake and promised to refund me within 7 to 14 days. When I did not receive my refund I contacted them again and they then said that the loaded my query and i would be refunded within 21 days. they then contacted me informing me that they will pay me one of the double deductions as a refund (which I received) and use the other deduction to cover my June payment. I contacted them at the ned of May to make sure this arrangement is still in place and they confirmed that it is. two days ago i was disconnected for not payment and they cant tell me when they will resolve this What a disgraceful way to do business.