Urgent help required. Roof window clips snapped

smiffy11family

Hi. Arrived at small cl in Suffolk to find our fiat suntor Motorhome roof window was open. It had been locked at start of journey and we have hardly ever opened it. Anyway the only thing we can think was that we heard a bang when a big lorry passed us and
assume that the pressure snapped the plastic fasteners. Lucky that the whole plastic window is still there but we have no way to fix it. Tried local garage unable to help. Tried tying it down to bed frame but constantly bouncing up and down. Obviously need
to secure it for next 6 days before we return home and can get to local specialist. We have duct taped it but not sure how long it will hold. Any ideas please. Many thanks