MTN CANCELLED MY CONTRACT WITH OUT MY PERMISSION !!!!!

GOOD DAY, I DID HAD 2 CONTRACTS WITH MTN. WHEN MY PHONE CONTRACT WAS NEAR TO UPGRADE,I CALL MTN AND CANSELLED MY PHONE CONTRACT. I GAVE THEM MY PHONE NO. SO THEY GAVE ME A AMOUNT I HAVE TO PAY. WHICH I DID. THEN I TOOK THE NO OVER TO VODACOM AND PUT IT ON PREPAID. IN FEBRUARY I WENT INSTORE TO PAY MY MODEM ACC. THEN THE LADY TOLD ME THAT THERE WAS NO NUMBER OF ME, EVEN MY ID AND ADRESS WAS OFF THERE SISTEM. THEN I CALLED MTN. SO THEY TOLD ME THAT MY CONTRACTS WAS CANSELLED. I NEVER GAVE THEM PERMISSION TO CANSELL MY MODEM! TODAY I GOT AN EMAIL FROM MTN, TELL ME I HAVE TO PAY THE AMOUT OF R3116,62 FOR CANSELLATION FEES. MTN EVEN AGREE SO I CAN SWITHC OVER TO VODACOM. TODAY I HEARD THAT MY CELLPHONE NO IS STILL ON MTN. BUT IHAVE A VODACOM SIM INSIDE.ON THE 24/01/2020 THEY SEND ME AN SMS SAYING THAT MTN HAS RECEIVED A REQUEST TO PORT MY NUMBER. WHICH I DID REPLY BY SMS YES I DID ASK FOR PORT. NOW I DONT NOW IF MY MODEM (INTERNET) IM USING FOR MY BUSINESS IS ON PREPAID OR WHAT? THE LADYS WORKING IN MTN STORE ARE USELESS. THEY DONT NOW ANYTHING. IF YOU ASK THEM SOMETHING, THEY JUST PULL UP THEIR SHOULDERS!! OR RESPOND BY SAYING, I HAVE TO CALL MTN. MTN IS THE WORST COMPANY EVER. NOBODY KNOWS WHAT TO DO!!! AND I AM TELLING NOW....FOR EVERY ONE TO SEE.......I REFUSE TO PAY THE AMOUNT FOR THE CANSELLATION FEE.....BECAUSE I DID NOT ASK FOR THE MODEM CONTRACT TO BE CANSELLED, BUT FOR MY CELLPHONE CONTRACT. THEY MADE THE MISTAKE, SO THEY MUST DEAL WITH IT! I AM A VERY ANGRY CLIENT AND WILL NEVER AGAIN TAKE OUT A CONTRACT WITH THEM IN THE FUTURE.