Changed The default url of wordpress

I mistakenly changed my default url of wordpress and website in general setting i replace the urls with the url of my page which is https://pakigeneration.net/?page_id=324 and now i m unable to do anything my wp-admin is redirecting to this i cant acces my wp-admin any more please solve my problem.
Please also tel me that can i install the wordpress using fttp i am waiting.
I will be very thankful to you.