Parcels disappearing off the tracking system now???

My package - RU ********** 55NL - sent from the Netherlands already late in March, has last been tracked to Witspos (Hub) on the 20th June and has now suddenly disappeared off the tracking system. I only saw where it was because of the sellers tracking system. How confident should I be about my parcel ever reaching me with such shenanigans? I will chase this to the bitter end.