Misleading advertising MWEB

Why does all these service providers mislead customers - i signed a new contract with mweb for R399.00 for the next 6 months - now you must remember this is an agreement!!! They also informed me to pay an order fee of R249 upfront via EFT - just to find out that they have also deducted this amount from my bank account as well. There should be a law against debit orders. I have not even paid my first installment and already received a letter informing me that the monthly installment is now R489.00 - i didnt want to sign up with these providers because everybody is complaining about Mweb' s rates - I guess its time to move on to the next one.