Mislead and failure to deliver

In April 2018 I received a call from one of your salesman regarding a router, however I emphasized to this guy that where I live this router will not work, but he insisted that this router will work. So after receiving my router I experienced that my SIM card was damaged according to the telkom consultant I talked too. The consultant told me to purchase a new SIM card and do a sim swap ( to my surprise I have to go to secunda for sim swap which is +45mins from Standerton). I called telkom and requested to talk to the manager but I was told the manager was unavailable and he/she will call me before the end of business hours but no call was received. So I decided to go to secunda for a sim swap, only to find out the LTE router you sold to me does not work in Standerton. Several case were opened, consultants have been contacting me. Last month I was informed that this account is under credit bearu. I have been calling Telkom and empty promises have been made (account was cancelled and outstanding balance has been resolved). It’s been close to a year and my account issue has not been resolved, today I called Telkom and they opened a new case again (maybe for the 5th time), I requested for a letter so I can send it to credit Bearu but they promised to send it ASAP, 4 hours later I called again and guess? They told me “since a case has been loaded the billing department is responsible for your case” and therefore they can not help me regarding this matter I just have to be patient for a minimum of 72 hours. How long should I wait HONESTLY???