Afrihost's ********* business practice!

I upgraded from 100mbs to a 250mbs package, 3 weeks after doing the upgrade I was still only getting 100mbs, even though Afrihost had deducted the pro rata for the new package on the very day of the upgrade.

After 3 weeks Metrofibre have corrected the issue (at the exchange I think) and my speed is now correct, the joke is that I ask Afrihost to credit me for the the 3 weeks of not having the 250mbs line (after charging me for the upgrade) and I get told that they won't credit me as Afrihost doesn't credit speed issues! How is that right? Its just plain *********!!