Enerbank USA Hard to get a hold of. Salt Lake City Utah

Our plumber told me we needed new piping for our home, because there was a leak under the slab in the kitchen. They wrote up a contract using Enerbank USA. Enerbank sent a coupon book, and I have been paying them off thru bill pay at my bank. I have tried to contact a representative at Enerbank and it is very difficult. I called once asking for the pay off balance for the final check, and the lady just gave me a balance that was 2 months more than expected. I have been paying double the monthly fee to pay this bill off as soon as I could afford it. I still don't know how much longer they will say I will have to pay. They have never contacted me at all, except to send out another coupon book. I will be sending my last payment (I hope). I do not know what my balance is. All I have is the coupon book,and the only thing I can do is add up how much I have paid so far. I sure hope I end this transaction with the best of conditions. I would say BEWARE to other customers. Lesley