Revell complaint: No urgency on missing items

I contacted revell due to missing decals a month ago asking them to help as I didnt want to start spending my money on a project I would not be able to complete. They said they would send me them free of charge and there was no issue so I started with the model. 2 weeks I still had not recieved them so I contacted revell again and said if there were issues I didnt want to continue to spend money on a model if I couldnt complete it. Again revell assured me there was no issues and that the delays in delivery were due to the pandemic. Today I contacted them due to not being able to continue or having the room to start another project and they told me there post had been returned and I am still waiting. It has now been a month and I would not had spent my money and time on a model I would be stuck on especially in this moment in time whilst I’m off work