Was not aware MTN had such a poor after sales service until my contract expired

I took a sim only deal with MTN paying R2 99 PM and i have the sim card on my router, last month my bill went up and by 300 and today i decided to give them a call. I was advised that my contract came to an end and for this month ill be paying 1800 for that contract whereas i have 2 other contracts with them where I pay R850 in total. I never received any form of communication from MTN about my contract coming to an end meaning i might as well cancel the rest of the contract because seemingly the same thing is gonna happen when the are 2 contracts expire they will automatically put me on month to month. Funny enough they want you to pay the whole amount in full and cant even negotiate payment terms. Im very disappointed with MTN and I will make sure i port the number I have to another network the way they disappointed me. My advise to anyone looking to take a contract with the don't d it they will sell you and rip you off like they did to me