Cell C refusing to assist with updated certificate of balance

Cell C is not even worth the 1 star that I am forced to put on this review. a -5 rating would even have been generous. After several emails and phone calls over the last few months to get my deceased husband's updated certificate of balance from them (after bill protection was eventually paid out - this took a year to get sorted), I have still received NO RESPONSE... When phoning customer care, I am told to send an email to ***... to which I get NO RESPONSE. I have sent numerous emails. Not even a "thank you for your email". There is no number provided that I can call to resolve the problem. This is ABSOLUTELY DISGUSTING service. Cell C is holding back the estate from being finalised. And to top it all, the account was handed over to debt collectors (and this is after I was instructed by Cell C not to continue payments on the account after my husband passed away). All I want is an updated certificate of balance, so the estate can pay the outstanding money. How hard can this be to provide? Should not take more than 5 minutes? Regardless to say... I will NEVER do business with them again.