I went to a mobileshop to get security code for my phone-didn’t work, shopkeeper didn’t put in any effort. checked computer myself and it worked. Could you please tell me if I still owe him his fee?

Salaam mufti saab, I went to a mobile shop to get the security code for my phone as it was originally 1.2.3.4.5 but it didn?t work when I got to the shop the shop keeper tried to look on the computer but couldn?t find the program, but the shop keeper didn?t put in any effort in. when I checked the computer my self and switched the phone off and when I put it back on t it worked without even putting a code in. I had walked out of the shop because my brother told me that we didn?t owe him any money for it as he didn?t do anything but I wasn?t sure. Could you please tell me if I still owe him his fee as he didn?t do anything? Jazakallah