Does anyone know where I can get MTN Smart T or its parts in Abeokuta or Ibadan

I just bought an Infinix Smart 8 phone with MTN ( redeem your FREE 500MB) instant data valid for 7 days..... When I dialed the code and pin , it wrote that my Infinix Smart 8...

Where can I get mtn smart t phone

I sell airtime using *502# with my phone but as a software engineer i want to know if the airtime and plans in *502# is available in an api i can then automate using codes...