Issue with Airline: advice?

For my trip next month that I booked last fall, Scandinavian Air has cancelled my return flight. They have given me one option to change to for free.

My itinerary has me backpacking across Europe, and the return flight they have offered is multiple days early, when I will be in a completely different country and hours away. I have already paid for all of my hotels and train tickets.

When I call, they refuse to help me out and say there are no other options, but their own website shows that they have the exact flight that they cancelled available, but at triple the price.

Their recent feedback has just been to get a refund and rebook with someone else, but as I have said, the prices are now triple what I originally paid.

Is there anything I can do?