Dpd laser very unprofessional, their systems are not updated correctly!!

My parcel was ****** by this courier driver, when I track it ,it shows that it was delivered to me on the 29th of April . I’ve calling and sending emails they are saying the matter is under investigation and I’ve been waiting! Why did they lie and say it was delivered when it wasn’t !! Tracking number BUFZA7DD12654AHYQ