**** Vouchers and poor communication

I love Isabella Garcia products but their customer service is very poor and their vouchers are ****. I received my Ambassador package with 3 different vouchers that I used to purchase products on the 4th of Aug, a week later of purchasing they decide to send me an email today not even a phone call that I wont receive my order because the vouchers i used are not mine. How can i use vouchers that do not belong to me where would I have received the vouchers from. The company is forgetting that I topped up the vouchers with my money nothing is been said about my money all I am told is that I must make another order no further communication what's so ever. I want to stop this Ambassador thing as monthly you debit from my acc but you always give me **** vouchers even last year the voucher I was given never worked it kept saying the voucher doesn't exist.