Tour company cancelled Auschwitz tour

Hi all, Apologies for the English. We're visiting Krakow and having a great time seeing your city. We have booked a tour for Sunday via a third party company to Auschwitz a while ago and were informed just now that there's no available English guides. They've offered us some crap lunchbox as recompense and we can cancel and get a refund however at this late date, we'd be unlikely to get a tour at all.

Anyone know anything that could guide us? Odds of joining an English speaking tour there, do we necessarily need a tour. Is this common?

Thanks for any help. Really enjoying Krakow and we were looking forward to Auschwitz (as much as you can) so saddened that we might get the full experience