you have ruined your wound by applying betnovate. betnovate contains a strong steroid which has interfered with the healing of your skin and made the infection also worse. PLEASE stop self medicating. Without examination of the skin condition and knowing the extent of involvement.. along with more information on ongoing medication or previous history of skin illness it is not possible to comment on the treatment that would suit you best. Please get the problem checked thoroughly by visiting a qualified dermatologist or you can send photograph of the wound for a private online consultation. Hope this is helpful.