Upgrade debt R10000

I got a call for a promotion to uprage my 2gig plan to 3gig sim only no penalties as this was a special telkom mobile was running. I now have to pay a penalty fee of over R10000. If that was the case as i confirmed with the sales lady i never would have taken the special. Im sitting with an old handset that was never upgrade. And now the apparent "special" has upgrade my sim for 22months and due to this i cant upgrand my hand set. Tel me telkom how do you penalize clients for upgrading to a special you offer? How in anyway do you penalize us if we want to pay you more monthly. So for 1 extra gig on my business phones that were suppose te be R50 extra im sitting with R10 000 debt and a letter that my sevice will be suspende. Please then down grade me back to my normal 2gig. This is absolutely crazy. I have send numerous emails, spoken to numerous managers and not one sigle person had an answer for me. I will never make use of you again. There is always trickery when it come to sales and special. Im on a business plan. You will now loose my 2 contracts as you wont lister or help.