Shocking service

For the past 2 weeks i have had very inconsistent download speeds on my LTE. I have called Webafrica several times, each call taking over 20 min as you are just left on hold. Each time the person assisting me resets something and instructs me to reset my router and i am assured each time that this is going to fix the problem. Unfortunately this has not been the case. I have not been able to use my internet to watch TV for 2 weeks now as I am lucky if i get download speeds of 3mbps at night. I find this totally unacceptable as this is not the service i am paying over R500 a month for. I require this issue resolved once and for all.