Can’t connect to app store

Hello, i can’t connect to my app store.

My phone was my mothers, but now I’m using it abou an year and now i have a problem that i cant connect to the apo store. I know all my passwords ad ID the numeber is okay, but suddenly when i press button that i forgot my password my moms email adress apiears and i cant conect.. so it’s a circkle that dont work. When i conect to my app store with my account, label comed out and says that some kind of problem.. What should I do?! Update for phone is made..