Vodacom Fibre Issues

Good day I have had the worst year with vodacom fibre the past year , with line not working internet being slow and so forth and every time you phone it in to tell them something is wrong its or a setting that is wrong or something else , 2 months ago i had them out to my house after 3 weeks of complaining my Fibre internet is slow , they told me its my old router i must replace it , so we did , wasnt working 100 but it was better than it was , last week i phoned in as my internet is slow streaming at 360p and buffers every 2 min. the speedtest shows its fine but its not. i'm 1 person on a 50mbps line fibre line. beginning of the week they change settings and it was fine for a day , the last 2 days again my internet is slow again. i don't know if its just the Alberton area that is having this problems. but ill be honest maybe its a good idea to move on to someone else cause the problems doesn't seem to end at all. i mean why pay R800 if wireless intenet can run faster on 1 bar of signal than the fibre line currently.