They supposed to have delivered my parcel from Rain on Wednesday 12 ,2023 they did not keep to their promise,even today nothing

They supposed to have delivered my parcel from Rain on Wednesday 12 ,2023 they did not keep to their promise,even today nothing.Today when I contact them they choose to tell me that they will send my parcel next week.This is not acceptable,I am a customer not then,they just telling me not even considering how urgent I need my parcel.I am requesting to receive my parcel tomorrow not Tuesday.Please assist.