Arrears paid up.........I don't think so

My mother started paying the outstanding amount as per Vodacom’ statement two years ago.

Now, a month down the line after paying off the outstanding amounts as per Vodacom she started getting phone calls from Hammond Pole Attorneys regarding another outstanding amount for R4634.43. No Vodacom Invoices attached to Hammond Pole Attorneys email that was sent to me just a breakdown on Hammond Pole’s letterhead for “Service of the contract” on the 3 numbers she just paid off.

Now after making payments for two years and finally settling the account as per Vodacom' Statement she gets threating emails and rude phone calls from Hammond Pole Attorneys.

I want to know what’s going on. My mother is too ill to be stressed about these kinds of nonsense.

Why did Vodacom not phone or add these amounts to the statement when she first asked for the outstanding amounts and when she cancelled the contracts?

Two years down the line????