Horrible service and Catfishing on Fibre adverts

I requested a quotation from MWeb, which they indicated that they will offer me the following service: 1. Free installation, 2. Free router, 3. Free Connection, 4. Free delivery and 5. 1 Month Free. on a Month to Month contract

I liked the offer and asked them to process the deal. The installation team came to install on the 27th July 2021, they couldn't complete the installation as the router was not delivered. The router was only delivered on the 30 July 2021. All of a sudden MWeb claims my services have been active as from the 28th and therefore I have to pay a pro rata from the 28 to 31 July 2021, my question was what services am I paying for if you only offered me services from the 30th and why am I paying when your advert indicated a 1 Month free service. I was told that how their system works and they can't change it and I can cancel if I want. When I say great, cancel, I was told I now have to pay for the router, installation and delivery fees, but all this were said to be free and I can cancel whenever I want as its a month to month contract. *****