Vodacom Blue Route Mall - Worst Service!

I have been trying for MONTHS to sort out an issue on my account while being overseas. My mother tried to go into a store (Blue Route Mall - WORST SERVICE EVER by Ebrahim Hardien and another lady) and the staff are of ZERO help and promise to assist and I still sit with a lawyer letter on my name for an INCORRECT invoice. I have sent proof of payments via bank statements and they have claimed they can see the error. Why do these people even get employed in customer service? He advised on 8th July that he had to wait for accounts department to respond which usually takes 48 hours. I am sitting in another country and NOBODY CAN ASSIST ME!! I tried to talk to Tobie who referred me to email which I did and then I got a response to tell me to chat to Tobie. Thats when my mom went in for the second time to Vodacom and dealt with Ebrahim Hardien who said he would help us and I thought I had found someone who was actually wanting to assist. I called my mom via Whatsapp and my mom called him with us both on speaker. I received 2 read receipts from his email when I tried to follow up to see whats happening as its been 21 days which puts me at risk of being blacklisted for an invoice that is an error according to the *********** staff. When I asked him why he didnt respond, he asked me "What must he do". What a load of hog wash man seriously! What am I supposed to do from overseas if I cant call the accounts department myself??? You really need to get with the times and allow for international calls to call your clients.