I have paid my tax to receive my parcel from China on 2nd of September even today I received a call that I didn't pay and I have uploaded the proof but they say is invalid I have been paying my taxes like this everytime when I have my order

I have paid my tax to receive my parcel from China on 2nd of September even today I received a call that I didn't pay and I have uploaded the proof but they say is invalid I have been paying my taxes like this everytime when I have my order. The whatsapp where I have uploaded my proof paying is not even checked.