Business ProfileforEPCOR Water

We manage a property that is serviced by EPCOR. They last year had created 2 accounts for the same address. One was supposedly closed back in October, then this year a tenant moved in and had the water transferred to their name. We received a refund check in the mail and not a week later a bill. So a bit confused I emailed them since the customer service reps on the phone couldn't see the refund check at all. The email I got back stated that it was for one account the bill for another. I emailed back saying we only have one address that we get services for. They send me an oops. but still say we owe. So I sent a check in for the amount they first stated we owed. a week later they stated they fixed the account and we don't owe as much. Ok the check will cover it. They said they never received it. Odd.. So we wait thinking it was lost in the mail. NO... we get in the mail a photo copy of the check with a note hand written on it stating please send payments to this other address that the az office doesn't process payments... SINCE WHEN??? ALL our payment before that went to the same address. Now, we don't have that check, and when I sent everything i had on the accounts and the emails today all I go was you need to void that check and send new one to the IA address.Wasting more of our time that we need working with tenants and owners. They are a huge inefficient company that doesn't see what is going on or keep track of accounts very well.Make sure you don't have duplicate accounts with them