What does DeinHandy say? Primarily they are responsible.

i haven’t heard from them,but i already emailed them about the problem. and yes,its their responsibilities,but i try my luck here if some of you might know the solution

update. reply from Deinhandy team

“According to our system, your order has unfortunately been canceled. Orders from our side will only be canceled if the customer data provided do not match the actual customer or contractual partner or are not up to date. At this point, we cannot find out exactly what data this was from our system. To do this, we would have to contact our customer center again. However, you should also have received an email with this information.
We will immediately send the cancellation to the provider, so that the entire order including the contract will be canceled. Even if this has already activated your contract, it is our responsibility to check all information thoroughly.
So if you want to order from us again, you should not hesitate and make sure that you enter all the details correctly.”