Poor service from MBD Credit Solutions

My wife's Foschini account was handed over to this company in arrears. I phoned this company last week requesting to settle the arrears, they told i must have a letter authorising me to do this on my wife's behalf and they gave me an email address to forward the letter. I emailed the letter and paid the outstanding account. I then phoned, which is quite a mission because it is hard to get through asking for a "paid up letter" and was told i will be getting the letter yesterday. To my surprise today, when i called i was told by a very rude lady that my wife is the one who should be calling even though they gave me the go ahead last week to go and pay and requested my email so as to send me the letter. This is very frustrating!!!