Hi,
Your best shot is to e-mail the wallet support and see what they have to say.
Good luck.
The OP already stated that he can't email their customer support because he can't login.
However,the names of the founders and developers of bitcoinwallet.com are publicly available in the About page of the website(if you click on their bitcoinwallet pages). Perhaps OP can do a google search,find their social media profiles:Facebook,Instagram,Linkedin,Twitter and try to contact them by sending a DM on some of these social media websites.
Not having a support email address and being required to login,in order to ask customer support seems kinda shady to me.I would never use this bitcoinwallet.com wallet.
You don't have to login to send an "email" to the support. They usually should have an email address that anyone can use to contact. So, he should try contacting them through email.
To OP, if you were able to login before and was able to make transaction through it, but now it got disabled, then I guess you got scammed. Did you have any coins on your wallet? Are they still over there or have they been moved?
If sendbit.io is an online web wallet, then they are also not safe.
I wouldn't be surprised if I see you posting over here one day saying that you have lost your coins.