VERY slow speed on a 10mbps line

I am so dissapointed at the service I am receiving from telkom...I have been with Telkom since August 2017 and the first few months I was farely happy with the service..It was in January that my adsl line just completely started becoming useless..I am only able to download (at slow speeds)..I cannot stream or even watch a simple one minute video on facebook as it is constantly buffering..I know some peole would think well atleast you can download, but I do not pay R800 a month to "just" download..I would like to be able to also stream and watch a simple video on facebook..I have spoken to a few people online and they keep telling me they have reset the line and it should be fine now but it just is not...I would like telkom to send a technician out to fix this problem because I am paying for something I can barely use...I am constantly disconnecting my wifi and using my data so I can do simple things like browsing..I have become so physically drained because it is so dificult to actually get a hold of telkom to assist..PLEASE help me..