Poor inconsiderate service

I app**** for sim card only contract in March before lockdown. They promised me the sim will be activated within 24hrs, which was not the case. When I visited the branch, it was closed due to Covid regulations. I contacted Customer care several times but didn't get any help. To cut the story short, my money was deducted every month for services NOT rendered and now I am been threatened with blacklisting. I refused to pay for early termination fees etc MTN is the worst inconsiderate mobile service provider I had to deal with.