Build a Website

Hi, A friend developed for me a website some years ago and I did not used it since 2 weeks ago. It is a php website, something simple where I can sell in a simple way. As a payment method my friend add bitcoin. So, 1-2 years ago, when my friend build it, I created an blockchain account to use it with the website. By then, blockchain was using version 1 or 2, when the api function could be activated or deactivated within the blockchain menu. So by then, I activated the api from the menu. 2 weeks from now, I thought to start the work with the website so I took a hosting, a domain and I made it online. In the admin area, you have options to set bitcoin payment on or off and to add the blockchain login and password to use the api. I`ve write there the login, password and all was good, but when I made a test the bitcoins are not inside the wallet. I`ve send 500$ for a test to the wallet address generated by the api, later when I`ve checked the wallet the money are not there, but the transaction is confirmed. I need someone to help me out to modify the files of the api so I can receive back the 500$. I will pay 100$ from them, for the freelancer. For the blockchain account, I have the mnemonic phrase(because by then that is what they were using) and now when I relogin after this years they send me the Backup Phrase, of 12 words.