I Cannot Unlock My Lenovo TAB M9 After Factory Reset

My children are using my Lenovo tablet, which is still under warranty and for which I have submitted the receipt, and they have forgotten both the pattern lock and email address. I performed a wipe data factory reset, but I still can't get past the pattern lock and email screens. I contacted E*** via live chat at https://pcsupport.lenovo.com/tr/tr/mslivechat about this, but she said they don't offer support for this issue. When I asked if I should throw the tablet in the trash, she told me I'd have to contact Gmail or Android. I asked how to contact Gmail and what to say. I also told them the email address wasn't known, but they said there was nothing they could do. OK, I'm changing my request. Flash a stock ROM for my tablet. When I explained that I had a software issue, she said technical service only provides partial support. I will also file this complaint in English on the Lenovo us page. E*** hasn't taken any action within the scope of customer satisfaction. If your procedures include providing software support, but I haven't received it, I'm also filing a complaint against them. Lenovo TAB M9 (TB310XU, TB310FU) - Type ZAC5 Sn.: HA21NX0C I request your immediate response regarding this matter. If you don't provide software support, then both your support and the tablet are useless. It's wrong to sell or allow users to use this device if they're likely to forget their screen pattern or password. You should include a statement in your advertising, website, and user manual stating that support will not be provided in this regard.