Cancellation of contract

Never in my life I was frustrated as by this point. My father passed away from Covid-19 and had 4 contracts (our family) on his name. From January until now I am still struggling to cancle his contract and converting the other numbers to prepaid. Every time I call vodacom or drive to their store the staff will give me each a different answer to my problem. Everytime I follow each different way I end up still not getting it fixed. One guy said we need to fill in forms, it did not help. One guy told us te call the service line. It dit not help at all. One guy says we have to email them. I am at that moment where I am really close to move from Vodacom to a bettee service. This is the worst service I have ever received.