How dare you Absa

I have been harassed with 17 calls in 1 day from a call center by the name of United Call Centre Solutions. Literally call after call after call. Every time I decline the call they call back. I have told them to STOP CALLING and yet they persist. I asked the agent to give me her name and where she got my details and she dropped the call on me, that tells me what I need to know. I WORK for a living I do not need these people phoning me all day!!! I block the number and they call from another one. I did some research and found that this company is linked to Absa Bank. HOW DARE YOU hand out my details to this company. HOW DARE YOU!! I want my number REMOVED FROM THEIR RECORDS and I do not care how Absa intends on doing this but they had better get it done because if I receive any more calls from this number I will take this further. This is an invasion of my privacy!!