paypal not deducting payment but redirecting as success payment

I'm using Laravel 5 with anouar/paypalpayment package to access PayPal API, the integration is working and I haven't encountered any problems yet, but when I do live payment from a paypal account, I got redirected to my success return URL but when I check the merchant account and my personal account, there is no activity in history and there is no deduction on my personal account.

I'm setting all the necessary details through PayPal API then redirect my site to PayPal express checkout. Is there something wrong with my set up?

Please help. My deadline is 2days from now.

Thanks in advance!

via Chebli Mohamed