Unable to send any messages from contact form

Hello Infinity Free team,

I am really not happy with this time.
I have created this website for my dad. I created a contact form on this but non of them are receiving emails. It says it has sent the email successfully. But, when i check my inbox i get nothing. I am using gmail accounts to send and receive the message from website.

I am not sure why it is happening now. I never had any issue working on others website before.

Please help me if you can.

Thank you!!!

Lily Singh