You could if possible buty the slot expander and use those USBs , otherwise I would check Sony customer service about the cost of getting it fixed.
How do i fix them
You'll need to disassemble the console and desolder the busted USB ports and replace them with different ones. I'd personally use cut-up USB cords from the local dollar store.
If you don't have any experience taking apart electronics, you might have to find someone to do it.
A person that is good with electronics would know what tools to use as well as where they could get electronic components at...I'm not good with electronics and would hope that someone who claims that they are would at least know those two things. Do yourself a favor, and do not attempt to do the repair yourself.