In December, we had booked our flight out of Tanzania for March 21st, with a destination of Dusseldorf, Germany. We had some faint hope of possibly being able to pick up our new motorhome at that time. Now, with only four weeks to go before our scheduled flight, we highly doubt that the entrance restrictions to Germany will be lifted by that time.
Our flight with KLM was fully flexible, with no change fees. So the only extra would be whatever the fare difference was to fly somewhere else.