***** claim on a 1 week old card no response from fnb

I have very recently received a new card as my old one expired, with in a week, my details was compromised and someone spent R700 on uber eats as I was busy on my phone, i immediately contacted the ***** line, and very quickly got to speak to an agent and he canceled my card and ordered me a new one, since then I have called 3 times each spending a minimum of 25minutes in the line and I sent an email to the ***** dept, I emailed and sent a claims document through aswell and still no response, I call last Friday and they told me the case has not even been opened yet, fnb told me it would take e 4-7working days to investigate this over the phone, and guess what, 7 working days has passed and still complete silence on where or when I will receive my money back, I'm upset as all my banking needs are with fnb and nobody seems to take this seriously, can I please get some assistance here??