Shocking, shocking.shocking service with no way to get out

Been with them for 3 years but trying to transfer the line turned out to be a nightmare. Been struggling from 1 Dec to get the line activated with no success. Phoned on day one and they said it will take 48h. Phoned after the 48h and was told the line will be active close of business that day. Again waited till COB and nothing. Phoned again and was told the person working on my account left for home but they will contact me again first thing the next morning. Next morning came with no contact. Phoned then and asked to cancel the order to which I was informed that i need to give one months notice to cancel a service which i dont receive. So now I’m stuck with a service provider for a month without any service. I then tried operations again and they made a promise that it will be sorted later that day. Again still nothing. In total spoke to 7 people (including at one point the receptionist) and still nothing. Bad service is not even a beginning and it is just promise after promise with no way to get out of it.