Telkom spamming with SMSes

Telkom is sending me spam SMS messages. I reply STOP to opt out but they keep sending. See below.

Dear [name], Upgrade your data contract on *** and get 10GB Anytime data + 10GB Night surfer data + A Huawei E5577 LTE MiFi router on a SmartBroadband 10GB Wireless LTE for R139pm X 24. Click https://tlkm.link/E5577SmartBBW10GB to upgrade online or call us on 10213. Ts and Cs apply. Telkom Team. Reply STOP to opt out.