For account queries, you need to contact Google Support. There's literally nothing we can do to help you here since recovering an old account or getting into a new one almost certainly involves password stuff - which we're not allowed to help with..... and we literally couldn't.
It's probably best for you to start here. Again, there's nothing we can do for you here at Tomshardware. We don't have access to their systems and cannot help you. Contact Google..
If you just mean you don't like the interface (how it looks), there are ways to tweak that in settings to make it look a bit closer to the older way it looked, but there's no going back completely.