Q: I went to unlock my phone for £25 in a second hand shop

Don't post your phone number, these are user-to-user public forums - I've asked the hosts to remove it.

Locked how ? If it's locked to a carrier then contact the carrier that it's locked to, only they can potentially unlock it.

If you mean activation lock and it's locked to the previous owner's account via Settings > iCloud then contact that person, nobody on here (nor Apple) can help.

They're cheating you, if it's activation locked only the previous owner can unlock it, if it is carrier locked only the carrier can unlock it. Ask for your money back.

Can't delete what number ? If you mean your phone number from your original post then the hosts have already removed it.

Does the phone have an activation lock?

Verify that your ios device is free of the activation lock.

How to check if the activation lock is active on a device

https://www.icloud.com/activationlock/ 

What to do before selling or giving away your iPhone, iPad, or iPod touch

http://support.apple.com/kb/ht5661

https://support.apple.com/en-us/HT201351

Eyecandyjoanne3 wrote:

 

HHello 2 weeks ago I went to unlock my phone for £25 in a second hand shop I been waiting ten days nothing happens

i then paid another £10 10-12 days ago and nothing I'm going crazy at the moment all most spending £100 just to get this phone unlocked so angry so anoued help me please

 

<Re-Titled and Personal Information Edited by Host>

Are you talking about carrier SIM lock or Activation Lock?

If you mean a carrier lock only the carrier it is locked to can unlock it.

If you mean Activation Lock only the person who set the lock can unlock it.

In either case, anyone who takes money to unlock it is just a crook.