Hassle upon hassle and no resolution

In 10 years, we had 1 ONE card that was declined by the company. The cardholder called their credit card company and said transaction went through. However, Square REFUSED to give me the funds without jumping through a million hoops and proving I had a relationship with said customer which I did (this is another business, not just an individual even). We completed all of that and Square's response. We have to refund the customer and get paid another way because they are simply going to close our account. Ten years and this is the [***] way they treat their customers.