Upgrade line to 4mb within 72 hours??? It

It's been five days since I requested the line from a 2mb to a 4mb line was told within 72hours It's been 5 days and yet it's still on a 2mb line and download speeds that I reported faults everyday for the last week below 1mb poor service from Telkom why if I switch to a new provider for Internet they can have me up and running in 1 day??? If you can not sort this out I will have to cancel my internet package with Telkom and go to a provider that actually wants to do business and keeps to its promises