Bad service

Good day, my mother-in-law passed away 9 April 2023, last year she took out cellphone contracts for me and my son. Yes the contracts were on her name but we paid our own phones. Until now it was never in arrears at all, after my mother-in-law passed I've send an email to Cell C to notify them that she passed and also the relevant documentation. I received a email back stating they received a duplicate email and there is now 2 case numbers. Suddenly the 25th April 2023 my phone stop working my number was deactivated and canceled. I went to Cell C Wonderpark o the 26th April 2023 with all my proof of payments and to try and sort this out. A lady named Tiny assisted me there scanning everything in and send a email to the relevant departments. Then the Friday morning 28 April 2023 I phoned her and she said that she need to send everything through to a different department and will let me know as soon as she has feedback. I kept phoning her but she was also waiting. Yesterday the 8 May 2023 I went back to Cell C Wonderpark and spoke to Tiny still NO feedback, she got on the phone and phoned them just to be told to send the email to another department. Last night I received an email to say that they can't assist we need to pay +-R25000 before they can open my number for pre-paid. The day I went to see Tiny she asked me why didn't I choose 1 of the options given to me when canceling the contract, I told her that I didn't canceled the contract and that No one even spoke to me about it. Every month I receive my statement via email to my email address, so my email address and phone nr is everywhere but NO 1 could email me or phone me. Just went forward and assist someone deactivating and canceling my nr. I phoned Cell C today and the 1 lady said she couldn't assist me because they can only speak to the account holder after I told her my mother-in-law passed away and told her the issue, I was so p*$#@ off I asked her do I need to get my mother-in-law out of her grave for her to speak to because they can't help me. All I want to do is to find out if we can take over the contracts and keep on paying them as they can't transfer my number to a pre-paid. The *** nr in question is my nr that I've got for almost 20years. Please I need help to sort this out, I'm sick and tired of *********** people that doesn't help. I've mailed, I've phoned even went into the branch. How can anybody just decide now I'm going to cancel someone else's stuff if you don't pay for it or even contributing towards it. Now I much rush around to get this sorted but NO 1 wants to assist me, but they could assist the asshole that done this damage.