Fibre Defective

I have been a MWEB member for over 2 years on an ADSL subscription, on 21 May 2018 I upgraded my subscription to Fibre. Since installation, my devices show “connected, no internet” and I will not be able to even open images on social platforms. After numerous phone calls informing them of the connectivity errors experienced, I sent a request through to MWEB on 18 June 2018 requesting the subscription be downgraded to my previous subscription as the product was not as efficient as advertised. The consultant informed me that they are not able to do that as I have a contract for Fibre although the Fibre contract has not even been a month old and that I must pay for a product that I am not enjoying. I continued to contact them telephonically to confirm a way forward as I do not want to pay for something I am not enjoying, and they are refusing to get this problem resolved. One of the consultants advised me to reset the router settings on 192.168.1.1, we did this, and the problem persisted. I phoned in again when I was instructed to change the router, this I did and still the problem persisted. I then contacted them again and they told me to link my laptop to the router to see if I still have internet connection on the laptop when my internet disconnects on my wireless devices, this I did and still the problem was not resolved. I contacted them again and this is when I was told to change the cable, which I did and to date there is no change. Even though MWEB is unable to get this matter resolved remotely, they advised me that they can send out a technician to come and have a look at the box, however, I will be liable for the callout fee. I do not see how any service provider can give such service to a consumer and not be reprimanded seeing that they are within a service delivery sector. I want this subscription downgraded with immediate effect as I am no longer interested in this Fibre product.