Worst service ever from MTN

I took a contract in march and was advised it will be R299. Now it seems im being charged R400. I have been trying to reach MTN since april. I sent an email to ask to cancel the contract cause i wasnt able to use it after april. The data was not being loaded, i didn't even know on what day it has to be reloaded. I was told my data will carry over to the next month. I've been sending emails with no repsonse and MTN was not debiting my acc until yesterday and they debited an amount of R794 which makes things very hard for me financialy especially during this lockdown. No one has had the decency to call me and ask me about any of my emails ever since. This is starting to be stressful. I dont get how you debit someone's account twice at once yet you never had the decency to call and assist me with my problems. A lady called and said my account is with the legal team and i have to pay to get helped and that they have to investigate if it's my connectivity or theirs. i get a simcard from you and i experience problems with it and you still find a way to blame me for it? How do i ensure connectivity?? This has inconvenienced me as i am a student and employee at the same time. i was not paid due to failure to work during lockdown and now the little amount i had in my account is taken by MTN. i will not use the servives anymore and i did send an email to cancel but no one bothered to even reach out. I am really not happy with how i have been treated. i had to constantly be the one emailing, spending my time and airtime to hold on the line and never get help. Kindly attend to me and actually help, not to threaten me about my acc being in the legal department