Highly Unprofessional

We have ordered an item in March, before The National Covid-19 Lockdown. This parcel would have been delivered in 5 working days. It is the end of June and we still have not received this package. If you call Fedex, the respond with "Your package is with customs and we have escalated the case" after that they want us to send all the documentation again. And so it goes on and on. They keep on telling us they will call us back. No one ever call us back or reply on emails. The Manager is also never available. I feel this is very unprofessional as we are waiting for this parcel for 4 months now and no one can assist us accordingly.