I applied for trainee bus driver at Arriva but not received a call from them

Welcome to r/TransportForLondon! Your first port of call for any Oyster or contactless payment issues should be the website: https://contactless.tfl.gov.uk. Create an account and register your card to check journey history and apply for refunds. Alternatively, you can call TfL’s hotline: 0343 222 1234. Oyster and contactless enquiries are open from 08:00 to 20:00 Monday to Sunday.