ABSA SELLING ACCOUNTS UNNECCESSARILY!

I am extremely upset with ABSA and will never ever take out anything again in the future with them nor will I recommend them. My personal loan account was handed over to an attorneys firm with whom I made arrangements to pay the account off. After making three payments on my personal loan account to which I have proof of payment, out of the blue I must hear that my account was now sold to an external company and worst of all is the account was sold for the original amount not taking into consideration the three instalments that I paid on the account already. How can you do this to me??? I showed commitment to make payments on my account. Now I must contact and make arrangements with a new company. This is not right!!