Disabled iPhone 7 won't connect to iTunes?

I forgot my password and my iPhone 7 is now disabled. It says that need to connect it to iTunes and I know I can restore it from there. However, every time I connect it via my USB and hold down both the volume and power buttons, the only thing that comes up is a "run diagnostic test" screen and I know thats not what is supposed to show up. What do I do?

Would you rather have an Android phone or an iPhone?

Windows phones are no longer being made, so Android phones and iPhones are basically the only smartphone categories there are now. I think they're both very good, although iPhones are overpriced, so I would choose iPhone because I prefer it, unless I'm on a budget.

Bank account declined when I have money on it?

Basically my hsbc account is declined on online shopping sites and iTunes. Haven't tested in a shop. I keep getting this problem every few months where I can't even download a free app or anything with my card connected to my phone. I don't get it. Like if something is free or I can afford it I should be able to get it.