Harrassment over an account that has been closed

MBD has been harrassing me regarding a TV licence that I did not take out. I have sent them an affidavit many many times and Carol Tibbets told me it was transferred back to the SABC. Then VVM attorneys started harrassing me. I spoke to Angelina who asked me to send the affidavit to her. I did and they confirmed that the account is now closed. Even after that MBD is harrassing me again now. Two VERY rude ladies phoned me from their offices telling met that I am still liable to pay even though I did not take out the TV licence. They are sending me sms'es on a daily basis. This matter has been sorted out and they need to stop harrassing me before I lodge a formal complaint. The service is absolutely SHOCKING and the people very rude.