None of the quests are working

I started a new game, talked to Henry’s friends at the tavern who gave me a mischief quest. But after the dialogue was over, the friends huddled together within each-other’s 3D models and stood like statues. I had to proceed alone to the objective marker, but as soon as I reached Deutsch’s house, the quest auto-finished.

Then I talked to combat master Vaneyk and agreed to train. But again, after the conversation, he just stood there in the town centre instead of proceeding to the training ground.

I even started a new game, but the same bugs repeated themselves. I have requested a refund because I am afraid I will lose the two-hour refund window. Should I change my mind?