Telkom contract renewal

I have been a Telkom client for many years, and renewed my current contract on the 23 March 2021. An hour later, another sales agent contacted me offering another sim package, and it is then that found out i was sold a package, with less data than i previously had and im to pay more for this renewal. After receiving my package, i tried to get hold of selldirect only to find out i am unable to make any calls from my current sim, because they have blocked my sim. If i open up this sim they have provided i am bound by this contract. They did not even have the decency to contact me and confirm if everything is in order before they uncerromoniasly cut my current line. I have got no other means of contacting them, and is unable to cancel this package. I will have to go to my nearest Telkom store and get a sim card just to contact them and cancel this package they sold me.