Regret taking LTE Contract after ADSL fiasco. Worst TELCO in the UNIVERSE

After TELKOM could not get my ADSL fixed to get close to the speed I paid for I switched to LTE with TELKOM. They delivered my router and SIM ... no instructions.. and I managed to get it up and running while my LAN cable was connected to the PC. I could not however get my phones/ipad or pc to connect via WIFI. (I had NO problems before with ANY device on my Cisco Routers) The agent that helped me with the deal advised me to log a call with 081180 which I did. This chap argued with me about RECEPTION which was not my problem but connect via WIFI to the device, He just could not understand. So he raised a case ***4 on the 21st April and said someone will contact me within 72 hours. TODAY , the 2nd MAY on the public holiday a chap calls me and asks me what my problem is? 12 DAYS...288 HOURS???? Who are you going to call ?? TELKOM? The WORST TELCO in the UNIVERSE?? Now I'm stuck again for 24 months with them..... Please do not fall into the same trap I did. Go for one o the mobile companies....