Cell c fibre does not honour it's deals on portal after accepting

Cell C fibre to home becomes non response and does not honour it's deals. Ordered on my fibre profile a deal with no strings attached and now they implementing full costing to packages. After getting a reference and complaining they now reduced the fee for 3 months and then full costing after 3 months. But that was was not the deal or offer accepted.even despite calling,the allocated agent does not take the call. They closed the call and sent an email. I resent them the screenshot of the deal and confirmed to them on their deal that this was different to the one they offered on black Friday. When I did the online deal and had to input credit card details,the mail after vetting was successful and accepted,but the billing is still reflecting the pre deal cost pm and now 3 months discounts. Ridiculous and no way of internal escalation.