I am not sure what your problem, but if you want to restore deleted contacts on your Android phone, this is possible. You can know how to do by using an Android data recovery tool, and just learn the guide for you to know how to use this tool to recover.
Hello, don't worry about this, just a little time, you can recover contacts from Androiddevice, then you can get back all the deleted contacts on your phone.
To recover deleted contacts on Android, if there is no backup, you need to ask help from Android data recovery software before they are overwritten. Just connect Android to computer, open the software. It will scan out all data on Android, including the contacts. Then you can easily get them back.