How can I get rid of a stray cat from my garden without harming my own cat?

There is a stray cat that keeps coming into my back garden. I have a cat of my own so can't put down any pet repellents. This cat has even come into my house and ate my cats food and scratched my cat.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).