Disgusting treatment

I received a sms on 21 January 2015 stating that I did not respond to prior messages on my Foschini account and that payment is requested within 48 hours. The service provider was MBDCS. Knowing that my account is up to date I phoned the telephone number with my reference number. Both the MBD call centre and I realised that it was intended for my helper that stopped working for me last year July. I was highly offended that neither Foschini nor MBD do verification checks of the cellular numbers that they receive. BUT, according to MBD, they have recordings where they ask the owing individuals for a 2nd and 3rd number, upon which MBD just send out threatening sms's to these numbers. A promise was made after speaking with a manager as well that my number will be removed. I now received another sms about money I owe Foschini.I phoned TFG Head Office who cannot assist as the account was handed over.I mentioned that if TFG cannot help, I will have to turn to hellopeter. Who should accept responsibility - FOschini as I am an excellent customer or MBD whom are embarressing Foschini as their service provider?