MTN BILLING ME FOR SUBSCRIPTION I DIDN'T ASK FOR

I had a WIFI from MTN for years , oneday I decided to get two more WIFIs and a special for 2 phones . I asked that they would keep the devices on separate accounts . After years of paying only R319 for my original WIFI i suddenly got a bill for about R2000 which I couldn't understand so I went to MTN which then told me that I subscribed to some service which I did not do , I have never in my life subscribed to any daily charge services , I don't go onto fishy websites to pirate music or give my number out to any **** pages I didn't even know my number for the wifi because it was in a wifi router the whole time I had it . This subscription is ********** ! I WILL NOT PAY FOR IT . I went to MTN to pay my other devices which I asked to be put on separate accounts BUT THEY COMBINED ALL THE DEVICES ON ONE ACCOUNT so if I want to pay for my devices I have to pay for a subscription which I didn't subscribe to . I did some research online and I see it isn't the first time MTN has done this to people . I WILL NOT PAY THE SUBSCRIPTION YOU CAN BLACK LIST ME IF YOU WANT I DIDN'T SUBSCRIBE . I tried to resolve it at the store but the employees are like a bunch or robots with the same few pre programed lines and no facial expressions or emotion . MTN IS THE WORST PHONE SERVICE PROVIDER I HAVE DEALT WITH