Repeated charges

I used square up once to handle a credit card charge of more than $5k. Two months later square up sent an email saying I had 15 days to dispute the chargeback. The very next day square up debited my account for the $5K amount. I sent emails to square up showing delivery of the products purchased from my company, and square up has yet to respond. The debit was not paid and my bank charged me $35. Four business days later they charged my account again. Same result and I was charged another $35. I closed the square up account, and closed that bank account. Two business days later square up charged my account again for that amount. I will have to pay the overdraft fee again. Lucky for me, the bank credited two of the three overdraft charges. Square up responded to the close account email faster then they replied to the dispute emails, and 2 weeks later I have yet to hear from them. This is not the best service to use. The banks charge excessive fees to handle credit card charges, so I guess we get what we pay for. Square was free (plus 1.25%), but it has cost me in the end.