Lost my phone number, job opportunities because of Fnb

I was retrenched last year June and ever since my payout there is no money going into my account. As a result my account was frozen. However I switched my mobile number from Cell C to using Fnb simcard as I was first sold a dream of free data which I only received 2 times, 2 9 months before my account can even freeze. I recently got ****** and my phone got ******. I went to the fnb branch to do a simswap for my number of 7 years . And was advised I can not do a simswap because my account is frozen and I can't even pay cash for the simswap. Which is only R40. Now I am unemployed, app**** in so many places and all these companies have my old number. I don't understand how can fnb not do a simswap for a simcard that is prepaid and the number was not even theirs to begin with. Now I've not only lost my phone but also job opportunities, So because of Fnb I'm now 10 steps backwards. My poor son.