What to do if the hose at a gas statoion broke off from the handle in my hand spilling several cups of gas on my pants, down my leg and into my shoe?

If you feel you have an injury or a burn from this accident, you should see a doctor immediately.  Making a report was a good first step.  If you feel your clothes and shoes are ruined from the gas spill, you can certainly ask for reimbursement for those items from the station.  If you have an injury which requires medical attention, you are also entitled to reimbursement for your medical bills and pain and suffering related to that injury.