Promises Promises NO SERVICE

After trying for a month to get my telephone line converted to an DSL line and being told various different sorties about fibre restrictions and that they can not change it at the exchange they have to come to my house, I got an SMS saying they would be at my house on Friday and it is a full day appointment - That will mean I need to take a day leave. I phoned them on Wednesday explaining I need a Saturday Appointment I was guaranteed I can have a Saturday Appointment 7 November. The next day I get another SMS to confirm my booking for Friday 6 November. Well I phoned again and they confirmed that the guy will be there on Saturday 7 November. Saturday came and went no message no guy pitching up. On Monday I phone them obviously quite annoyed only to be told no the appointment was for Saturday but the technician changed it to Monday - NO COMMUNICATION TO ME. They can only get away with such TERRIBLE service because if you want a land line there is nobody else to go to.