Spice Jet Airlines — Double billing

I was charged twice on 7th Jan for a booking once on my credit card which according to site did not go through due to error in SpiceJet site then on my debit card. Credit card company says amount if credited to SpiceJet but at SpiceJet all I get is our systems down please write to this email that email a case number no call nothing . Worst service no worry about customers . Case number is 10282239