They all charge fees, and some of them are legal swindlers. It is possible to advertise and help find investors-that's too much to ask, and there are too many charging items, but few of them succeed in the end. You can find investors, but what can people do? In the end, your patent is not good.
I've been cheated, too. My patent application number is:
253287.
27172131..
2812954.9
Friend: Be careful in filing, and I wish you an early success!