payza made me lose $1693, no care, no support, and no respond !! Payza suddenly reversed $1693 from my account without any care, it is totally fraud and unsafe bank London Internet

Payza (The worst online payment processor ever).. They suddenly reversed $1693 from my account without any previous warning, I have sold a lot of services to one of my clients, the last service delivered to the buyer was on 18/12/2015 and on 31/12/2015 I suddenly found that payza reversed two transactions related to that buyer, then reversed another one on 11/1/2015, then another two transactions on 13/1/2015, and the last one was on 19/1/2015, and when I asked them they replied after almost one week saying that the source of the funds is fraudulent !! I wan to ask, Who should take the responsibility of fraudulent funds !! me or payza ?!! and after almost 15 days and after I have delivered the full service they discovered suddenly that the funds is fraudulent !! is that my fault !! they should protect my business not to stole or waste my money, I am not responsible that they are depending on an insecure and poor payment processor, despite of very bad and unhelpful support, they are always replies after two or three weeks and sometimes don't reply at all !! I want to restore all reversed funds again to my account, I will publish a scam and fraud reports against payza, they are really not deserve to be a secure and safe payment processor, I will advise everyone to be away and aware from them. All Transactions and services details are listed below: Transaction date: 9/12/2015, Transaction amount: $325, Reference: 99AE3-05622-21294 Corresponding service: Three amazon gift cards of $100 each. Service status: delivered to the buyer on 9/12/2015. Reversed on: 11/1/2015 Transaction date: 9/12/2015, Transaction amount: $105, Reference: 298CF-CEAC2-E2BD6 Corresponding service: Charging the buyer's payoneer master card with $100. Service status: delivered to the buyer on 9/12/2015. Reversed on: 19/1/2015 Transaction date: 10/12/2015, Transaction amount: $210, Reference: 5BA73-68BC1-96175 Corresponding service: Two steam games gift cards of $100 each. Service status: delivered to the buyer on 10/12/2015. Reversed on: 31/12/2015 Transaction date: 11/12/2015, Transaction amount: $325, Reference: D4985-A505A-635DF Corresponding service: Three amazon gift cards of $100 each. Service status: delivered to the buyer on 11/12/2015. Reversed on: 13/1/2015 Transaction date: 18/12/2015, Transaction amount: $624, Reference: E3B69-EA539-8B8DB Corresponding service: Six steam games gift cards of $100 each. Service status: delivered to the buyer on 18/12/2015. Reversed on: 31/12/2015 Transaction date: 18/12/2015, Transaction amount: $104, Reference: 4199A-88AA7-02053 Corresponding service: One steam games gift cards of $100. Service status: delivered to the buyer on 18/12/2015. Reversed on: 13/1/2015 I have the evidence that I have delivered each service on time, and I can introduce it to ripoffreport or any other association that can helps. Please help me as you can, I am the only loser not payza or the buyer, and I am ready to introduce all evidences and proofs you need. Thank you for your great support.