Mis-management of my account and incompitance?

On the 30th March 2020 I made an order on your website for ADSL Line, then i called you because I made a mistake and want you to cancel it and make a new order. On the 17th April I ordered the MTN LTE fixed 100Gb x100Gb Combo with free simcard. You sent me the simcard and a Invoice for R41.00 pro rata fee and then for R614.00 for payment on the 30th of April . Saying you bill you clients in advance, my next payment will be en of May. So instead of paying the amount on the 1st of May, I paid it EFT into your account at the amount of R257.00 on 17 April 2020 and R614 on 20 April 2020 for my MTN LTE connection from the 1st of May 2020, I pad R257.00 again on 24 April 2020 because they demanded I do it before they deliver my simcard. As i had the wrong decoder i had to buy a new one and only recieved it 2 days ago. I set it up and asked that the lock on my simcard be removed so I can use it. Then to my surpise they told me to please pay my account first seing as my payment order on my bank did not go through. Thats when aal the trouble started.They send me an Invoice outstanding amount R 1160.00 so we started talking. Instead of correcting their mistakes on my account they now have Cancelled my MTN LTE Combo and suspended the first mistake on my account! Now I have paid for sevices but have nothing. I wrote them several emails to correct their mistakes and activate my account, but nothing. I have written to your manager but no answer. I will send my Statement and aal the communication, for you to see, if you are interested. Maybe now I will get reaction from your company?