I have used wallet BTC from btc.com, but i could not found the private key and the wallet always changing. It was becoming problem for me, because i could not made backup. And i have contacted the support, still there are not the answers. So give me your suggestions what i have to do?, thanks very much.
As know they did not give the private key but before using a new wallet you are required to download the backup wallet.
Download Your Wallet Backup Before you start using your new wallet, please download the document below backups
It is important to keep this confidential backup and to store it securely offline. In case of emergency, this document backup lets you access and recover any funds stored on the wallet. download wallet backup