iPhone 12

My husband sent the iPhone12 on 20/05/21 to be repaired. Today is 29/06/21 there is still no phone. We contacted the service. The website sent a message that. 03.06. he sent back the phone. Tracking number. 31392210567524 DHL courier Great Britain mail. I did not receive a call. I do not understand what happened. I don't know where the phone is and who is using it. I have a loan for each £ 35.37 monthly fee. Due to the current situation, please will cancel my credit. Thank you very much for help. Grzegorz Markiewicz.