Wrong billing from Hong Kong

Dear sir
I just paid for the plan of $134/month, but I discover it is in us current, I am not afford for it, I am very sad, before that, in today a man called Christ called me, he said from AWS, he let me to choose the cheapest plan $32/month, his phone number is 852-25971688, do you recognize him?
Firstly, please let me change the plan to $32/month.
Lots of thankfulness
Regards, Johnlai0718@gmail.com
John Lai from Hong kong.