Nimble Group - Bad service and do not send paid up letters

Nimble bad service. Received a letter of demand for a Vodacom account that was paid via debit order 2,5 years later with no breakdown for the amount. Prior to this email i had received no communication. After calling the company and chatting to Lungelwa Lindiwe and Regina Fillies, i could see i was getting no were so i decided to pay the amount. I was promised a letter stating the account is paid up (see mail copy below) and and still waiting for the letter. After numerous emails still no letter from Lungelwa at Nimble Group Clearly Nimble Group do not care about clients and do not understand how to communicate. Is this how your treat clients?

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Will send you a paid up letter for this account as proof that the account is closed. Thank you and have a wonderful day. Lungelwa Lindiwe Corporate Collections

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From: Regina Fillies (Lnk) ********** Sent: Monday 17 September 2018 10:28 AM To: Charles Ramchuran ********** Subject: RE: Altech Autopage Oustanding Balance

Good Day, With regards to your email below. Please forward reference number or your id number in order for us to allocate your Account. Regards Regina Fillies Customer care consultant