Recycled number with Poor Service (Call Centre)

I took out a new contract but was given a recycled number. I receive on average 6-8 calls per day with many sms from banks and institutions. Please, I did not sign up a new contract for this headache. Its really frustrating receiving calls throughout the day and even at night. I called the call centre - that alone was a nightmare asking TOBI the robot for assistance and requesting to speak to a human. It took me 1hr30min before I finally could speak to a human and was told they cannot help me. Now you can just imagine how I felt after that. This is not customer service, I am paying and not getting a free service and don't need to suffer in such a manner. I know you a big organisation and have no time for us individuals but it would be great if you can experience the hell we as consumers must sometimes go through just to be heard and after all that effort just get told "Sorry we can't help".