Western Union.
To make Western Union Payments, the customer must go to an agency that supports this type of Payment.
The agency can be on a Postal Office, a Bank, a Store or other entity.
On the following link you can consult some of the agencies that are closer to your home.
https://www.westernunion.com/gb/en/agent-locator.html
The payment is made in Cash, just fill out a Payment Form and on the end you must pay a tax to the agency to complete the payment.
For more information, contact an Wertern Union Agency or visit the Site:
https://www.westernunion.com/gb/en/home.html