NEW PHONE NOT WORKING AFTER A DAY!

I recently lost my phone and claimed from my insurance. I went to Vodacom Mall of the North where I met a very sweet lady who helped fill the forms and kept me informed. Though Cellsure took 4 days to respond I eventually got my phone on Friday 18 January 2019. The battery was on 79%. I switched it on and after a few hours it switched itself off and then on again. I thought I must have pressed the wrong button and let it at that. On saturday evening I put the phone on the charger overnight. In the morning I checked the battery and it was now on 77%. I put it on the charger again and went to church. When I got back it was now on 69% and this time I found it off. I went back to the shop and told them what happened. Now please bear in mind that I have not had a phone for a week already. I am told they need to book the phone in and I will get it after 7days. 7 DAYS!!!!! That will be 14 days without a phone!!! When Voda debits my account I do not remember being told that they will debit when it suits me. I expect a new working phone by 16h00 - 22 Jan 2019. If not, I will escalate this further and I am pretty sure I can get much more than a mere R6k phone. Tik Tok!