Throtteling of feed

Since i joined Voxtelecom almost a year ago ,i noticed that my internet speed was getting slower near half of a month and normal again at the start of a new month.On complaining, Vox was of the opinion that the fault was at Telkom.Vox sent Telkom to my house who determined that Vox is throtteling my internet feed.I have an uncapped 4mbps contract at Vox.Tests done on the speed gives results of less then 1mbps.Only good for cellular usage and not for streaming my series' on my lovely Showmax.After numerous emails Vox responded saying that they have a fair usage policy.This means that if a user used a certain amount of data that such user is limited to 1mbps for the duration of that month.I am not getting that even.I have forwarded results of tests to at least 3 persons at Vox.No response.I enquired as such policy was not in my contract.No response.I received an email that my query was solved and that they spoke to me.I disputed this and complained again.No reponse from Vox.I sent numerous emails to employees at Vox whom i dealt with.No response.According to my contract I should contact a certain body should I have a complaint with my service provider.That email address for complaints on a template does not exist.I did reasearch and found a new address for this body.Requesting that they should contact me.A month went by without response.I want to get rid of this contract but my contract does not stipulate the procedures.Stupid of me but I never contemplated divorce.I hope through this forum,Hellopeter,that Voxtelecom could at least contact me.I still pay my monthly fees.