Wife of Deceased

I am so disgusted with MTN , My husband passed away in August 2021, I phoned MTN in September , trying to cancel his phone contract, after a few call and emails I was advised to send his Death Certificate, ID , Which I did on numerous occasions , I even went into MTN offices I was told by the consultant she cant help but if I have sent all the documents , I must not worry , someone will get to it, I sent follow up emails , follow up call's, every time I was told send documents, the final out come from MTN, THEY handed over my Deceased husband to the lawyers for not paying , I am disgusted,