I will never ever do business with Vodacom again

I am utterly horrified at Vodacom's service (or, rather, lack thereof). One of my colleagues passed away. We need to cancel the contract on her company phone. I have tried to do this every single day for THREE weeks now ... to no avail. After spending hours on the telephone and on emails to Vodacom, they have still not cancelled the contract and I continue to receive invoices. I am aghast at Vodacom's complete unprofessionalism. Needless to say, I will never ever do business with them again.