ADSL or lack there of.

I have Been a loyal Mweb customer for over 10years Now. I upgraded from various packages over the years at the advice from Technical staff at Mweb. I was more than happy with service up until last year December when things started getting really bad with with my connectivity. Eventually I was advised that my router was outdated, and advised to upgrade, I did do so to a more current Huawei router. Connectivity did not improve, I was then advised to upgrade my Adsl package as my package was outdated and the lines had been improved to 8meg lines, I did so at additional charge, My ads line now went from 4 meg Adsl to 8 meg (WOOHOO) the speed of the line was marginally better but was extremely erratic and then the speed dropped to below what I was use to on my 4MEG ads line, Fast forward a few months , speed was terrible, I was forced to now downgrade my net flicks to only play SD.. I was previously able to stream half HD on my 1st 4 meg line, We continued testing back and forth,I screen captured many speed test or lack there of and emailed them through to technicians, I was also advised to purchase another new router and new line filters etc.Eventually, last week after another 60min conversation and been bounced from department to department , I was told that it was not possible for me to have an 8meg line as the copper cable was to far from the exchange so the best that I could have was a 4meg ADSL package... That it is exactly what I had in December the previous year. I was advised to upgrade to 8MEG by "Technical" staff . So my query is why offer a service , then charge me for the so offered service that you were not equipped to deliver to me in the first place. I have now been advised and have been down graded to a 4meg ADSL package where I am not even able to do a speed test as the connection is so slow. Every time I Log a line Fault through the Mweb portal and query the technicians I get a call completed success ...I still don't have service. The line test tells me my connection is poor but I actually think they are referring to Mweb service. Guys I am Frustrated , you charge a premium for a package you cant deliver , then when I complain and get upset you tell me I'm in the wrong for having a package that you offered me but cant deliver on, I then complain again at the lack of connectivity and I get told hey according to the calls logged my complaint has been dealt with, but yet I am still paying and not getting a service. More than 10years I have been with Mweb ... and this is how I am treated . Frustrated at the lack of Technical / compassion / professionalism that I am offered ....