CHINAGPAY YONGDAN - Higher Amount Deducted

I had seen an Ad in Instagram, In which the product was posted stating it was a Ultra Low Cost Promotional Product. I was very excited and opened the website and checked the item , the amount was very low and I went on to order and after my payment I received an email of my draft payment , which had total amount paid as ****(Dollars). It was a very large amount. I dont what to do! And also when i checked with the bank , they told it was a suspicious transaction so they have blocked my account.