Bad service and untrust worthy company. very ***** company

Took a cellphone contract with them for work, received the phone and simcard but the sim never worked. Called them told me to do a simswap which i did but the sim never worked, then they promised to deliver one which they never did. I kept paying them R449.00 every month for almost 2 years without services. I only reversed one payment after 6 months because i was not getting any services from and i kept getting calls from them stating i skipped a month and i tell them that the reason is that i am not getting services from them they acknowledged and said they will sort it out but i never received any services from them. took them to Maxlaw and they acknowledged that they owe about R7000 then after 3 months they started calling again saying i owe them and its reflecting on my credit score as missed payments. Till today they are sending me messages that i owe them via Nimble collection. And when i send Nimble proof that i have been paying without services, they ignore and send messages every month.