Lost baggage nightmare

Their customer service is non existant. Their staff assistance is zero in Luanda. Lost baggage on a flight. There is no feedback from them. There is no contact number you can call to find out if your luggage is still sitting at Luanda airport. We had a connecting flight Cpt to Lisbon. On arrival in Lisbon the luggage did not arrive. We reported it at Lisbon airport. Just as useless. All they say is. " we have had no feedback from Luanda, wait and WHEN WE HEAR from them we will contact you" Reference LISDT29959 Surname Thomas.