It can certainly be difficult to decide on a course of action when there's a lack of reputable doctors to give you advice. To treat a bacterial infection with antibiotics, it's helpful to know what type of bacteria are present in your ulcer. Different antibiotics are active against different types of bacteria (which is probably why the tetracycline did not work for you, while the generic gentamicin did).
There have been some studies about using honey to treat leg ulcers, but the results are not all very promising. Also, the studies that found that honey was effective used a special type of sterilized honey, not the normal type you buy in a store. As this article says: "It could be disastrous if people treated wounds with ordinary honey, because it has not been sterilised or standardised,” warns Dr Cooper. “Clostridia bacteria, present in some honeys, can cause gangrene.”
I would suggest that you focus on trying to find an appropriate doctor and antibiotic for your infection. Good luck!