I certainly support John's advice. In different circumstances I have seen the only effective means a customer may count on, in case of denied service, is the credit card company. In one case I tried and sued a regional airline for having canceled my flight before vanishing from the market. I won, but even with a court order in my hand I could not get my money back. I got it back, anyway, through my credit card company, Visa Cartasì, after sending them the complete case history. So, be sure not to throw away anything, either emails or sms or paper documents, until the merchandise or service you have paid for has been delivered.