where can i find refund money?

im starting new business and i dont want to have bad feeb back from clients about website speed because now vendors complains about this its ,takes time and refresh alone
you can check this by yourself

i tried everything and its not working still load slowly

can you help to add it

SFTP/SSH details

i followed this video :
https://www.youtube.com/watch?v=4n1re0jKorc