Horrificly bad service

On the 1st of April my debit order from Ibits was returned due to insufficient funds. Due to the Covid19 pandemic I did not receive payment from my clients therefore I had to funds in my account. I have to use my savings to pay my expenses at the moment. On the 6th of April I paid my Ibits account via EFT payment. On the 7th of April they took a debit order off my account, which my bank allowed on extended overdraft. The debit order was taken off and was not returned. I paid money into my cheque account to correct the overdraft again. So, in April I made a double payment - the EFT payment and the debit order which means for May my account is in credit, therefore I should not pay May. I sent Ibits several emails to correct the account and to make sure they do not debit my account again the 1st of May, but without success. Over a period of 3 weeks I've been trying to sort this out but the only reply I got today, was "we are attending to your request". Tonight I got a sms from them saying because of non payment I will have internet disruption. I sent them my proof of payments for BOTH payments and still they have not corrected my account. I tried for a hour today to call them but they just don't answer their phones. It's like running into a brick wall the whole time. Worst service I ever got. Brilliant wireless internet but very *********** staff and pathetic customer service!