Telephonic abuse from call center staff

I have been receiving calls from various people at the call center in connection with a Truworths account. I had a debit order for my monthly payments. My husband lost his job and we have been battling financially for the past seven months. My debit order didn't go through and the account was handed over to Blake and Associates. I have been receiving up to five calls a day here at work. This causes a lot of problems for me. I have told the people that call what I can pay and they are not taking any notice of that. All I get told is that they will make a note of what I have said. I am at my wits end with these people. Do they honestly think that a person can just conjure the funds out of thin air?<br> I find them to be most unprofessional and I am tired of being abused over the phone. The stress that is being added to my life is just not worth it.