********* business and horrible customer service

When I signed up mid Feb, I was told that I would pay R399 for 3 months (being from mid Feb-May) then after 3 months, I would be charged R709. However, last month I received an invoice of R709 and was told that this was now my monthly payment fee. Common sense and any ethical business will tell you that I should’ve paid R399 as I was still in the 3 month promo window but you didn’t honour the very same contract and terms we both entered into. This month, as a matter of fact, this morning.. I received an invoice of R809.. R100 more than what we agreed to and no communication regarding an increase was communicated which leads me to believe that next month I’ll receive an invoice of R909 and the following R1000 as you clearly make up prices as you go. We both can agree that fixing prices is in fact ******* and yes, ********* without prior communication and consent. Having said that, I would like to 1) downgrade to your cheapest plan with clear and concise pricing written down. 2) if the above is impossible since you guys make the laws and terms as you go, I would like to cancel my contract from the 1st of June (I paid for May and should be legally connected until 31st midnight) and disconnect your power line so that I can find a cheaper and most importantly trustworthy service provider. Should we agree on the 2nd option then I would require you to disconnect and pick up your router within 7 days while I look for another service provider. I am willing to escalate this to whatever regulating body/Ombudsman and their customer service is nonexistent!! What a horrible institution!