Conflicting and changed delivery dates

I just saw that my order is being delayed having a later delivery date. EACH of the products I triple checked yesterday AND today before buying to see whether it is still in stock - which every single product was. Now in my confirmation email it states that delivery will only be on 23 March?! All except one of the products suddenly show additional shipping times and one's price suddenly also just changed since this morning. Really disappointing, especially as one of the products is cloth masks for my workers and myself that is suddenly just delayed.