I doubt it would get to the stage of any sanctions being imposed. I'd imagine that if they didn't get the message when your wife explained about not contacting, they will certainly get it when the OA tells them.
I was having similar problems with two utility companies, they were insisting post-adjudication that I must pay them in full the arrears we had built up pre-bankruptcy over the winter. It took weeks of trying to get the right person who understood I couldn't give preference to their debts, eventually got sorted with one and still waiting for the other to come back to me. The OA has said they will deal with it if I've no success but I'll leave that as a last resort.
Bankruptcy and all it's implications are still relatively new to alot of people, even collection departments. I wouldn't get too hung up on it.