Dining plus cheat by making calls

They make a call on 5 june 012, and 6 june 2012 from 6900 and offer for a package that include a free stay in a 4 or 5 star hotel n discount in food n drinks in selected places, discount in electronic items and said that you will receive the voucher within 15 days. But no response is there till yet and a amount of 5499 has been debited from my creadit card. When I make call on the number the is no answer.