Do not ever use BA they will lose your luggage ruin your holiday

We had planned our trip to Iceland for 18 months prior. We are from Cape Town, South Africa so invariably from a much warmer country. First and foremost, BA changed their flights from London Heathrow to Iceland with a 24 hour lay over both ways, which meant that we had to cancel the BA leg to Iceland and book through another airline as we would have lost more than 2 days of the trip. Another 14k! To compound the matter our luggage did not arrive in London. We logged a case with BA and heard nothing for 2 days. We had planned on traveling West and had to completely change our itinerary in the event that our luggage made it to Iceland within 72 hours, which by the way is BA commitment. We still heard nothing so eventually called which cost another fortune and we were advised by BA that our luggage is still in Cape Town, however BA would arrange for it to be sent to Iceland soonest. Now let me explain that we are in one of the coldest countries on the planet with no clothing and traveling in a campervan. When we logged the ticket we were explicit on where the luggage should be delivered to in Iceland. Notwithstanding BA in their infinite wisdom sent the luggage to London Heathrow and back to Cape Town and then had the ordasity to email me to collect it from Cape Town whilst i was still in Iceland, to reiterate the address for delivery of the luggage was clearly stipulated on the case raised. To add fuel to the fire the other suitcase is missing and we have heard nothing from BA in terms of its whereabouts. This is shocking customer service and has completely ruined a holiday which was planned for and saved for over 18 months. We both fell extremely sick due to insufficient clothing and resources. Would highly recommended any traveler from South Africa to use an alternative airline