Complaint Review: Loan Depot

In May of 2017 we refinanced our home with Loan Depot, with the 1st payment due June 1st.  We filled out a form for automatic withdrawal from our bank account.  We were told that there wasn't enough time for the automatic payment order to effect before June 1st, so we needed to send them a check, which we did, certified delivery with a signature, and receipt requested. We have the USPS signed receipt and the canceled check.
Then on June 1st they automatically deducted another June payment.  We complained and were told that the extra payment would be credited as a July payment, but on July 3rd they withdrew another payment.  By this time I'm getting a little tired of the run around so I asked them to just return the extra payment, which they said the wouldn't do, but that they would be sure the loan servicing dept. had a order to not take out a August payment.
Then we discovered they had in fact sent back the extra payment to our bank, but failed to withdraw the August payment.  Now they've sent a late payment notice with a late charge, claiming we owe the 2 payments.  Everything here is their fault because they are in control of the payments We're on SS so the money is in the bank every month.  I believe the goal is to force a foreclosure and ultimately steal our property, which is apprised for about 50% more than is owed.
If anyone gets an offer to refi from these people, don't do it they seem to be dishonest, or at best very inept.