Liable for ****** Phone Bill

I wish there was a rating for - 0...for the poor service I had. My phone was ****** in October 2019 and i immediately called Telkom call center to block the phone.i went to police station and open a case and went to telkom the same day for insurance claim and they told me to deal direct wit the insurance company... I waited for my new phone almost 3 weeks. But that's not the Problem!while when I received my monthly Bill it was Over R7000 and I was very upset cause my payment is only R1200 but I've got the surprise of my life... Apparently while I was on the phone asking telkom agent to block my phone they didn't do tht immediately and the ****** made purchases of more then R6000 on my Telkom contract I really don't know how this was possible... I phoned telkom several times and no one at the call center can assist me. I asked them how can I be liable for that extra money if I reported my phone ****** and telkom didn't blocked my phone immediately and the person just say there's nothing they can do I have to pay the money end of November otherwise my bill will go into arrears.I've asked them if there is anyway I can pay the Amount into 2 payments but they will still deduct my R1200 end of the month and the half of the Others and the lady said no... Where in this world do you get a R7000 cash to pay one bill in this day and age... I've went to N1City telkom and spoke to the Floor manager Heather and she said this is not acceptable gave me a no to contact but this( *** no say they don't deal with such things and put me through to The telkom call center again and nobody are able to assist me. If this is the way telkom do business I have no other choice to go to icasa