Made payment and still had money drafted

Fed up with Hughesnet, spoke with 2 reps via chat and spoke with someone on the phone. We're on autopay, and have had every payment drafted out of our checking account. They did not take June's payment out until 2 days after it was due , so I paid what was due. They then drafted over $100 out of our account for the payment. I told them that we overpaid because they took out the money after the due date and they insisted that we didn't make a payment two months prior. That is absolutely ridiculous because we're on auto pay and I have proof from my bank account that the money was taken out. They are just flat out lying.