I started my PhD some months ago. My advisor was also my Master's advisor. He was impressed by my skills and passion so I enrolled in a PhD program with him. What happened is that my topic changed quite lot and he didn't tell me clearly before enrolling. Basically my master thesis topic is in the trash for him now (FYI we published in a top conference with that). He wants to work on a totally new idea, on which not even him has the right expertise, so basically I have to study a whole new state of the art, have the ideas, acquire the skills and present the results - why do I even need a PhD advisor then..?
I feel lost, abandoned (I have nobody, nor other PhDs or PostDocs to work with) and hopeless. Yes, I tried to explain my advisor that I'm not excited by the new topic, but he's like "I pay you for this, so you'll do this".
Any experience on situations like this? Should I quit and say goodbye? Am I wrong expecting more by a PhD advisor?