My photos have disappeared and I can't log in to iCloud.

I had around 5,000 photos on my iPhone SE 16GB. My storage was pretty full to the point where snapchat wouldnt load/take pictures. At this point I deleted some photos and apps etc. only to find that it didn't help. All of my photos then disappeared and my phone kept telling me to log in to iCloud even though I already was. So, I logged out of my iCloud and on trying to log back in, the page just stays 'verifying' forever.

Thus I am left with...

- no photos

- no apps (unable to download any)

- no iCloud

- no service (for some reason)

Please please please help me fix this mess 😟 😢