Oracle Applications Developer interview questions

It took months, 7 months till the final interview. In total 5 rounds, java mainly and last one java + manager round. After the final round, hr called for salary negotiation and everything was done. But no offer letter, nor they tell about its status. This is so unprofessional. Disappointed from Oracle they should at least inform candidates if they are putting them on hold after selection or the hiring is frozen. All I get to hear is "It's in process". Since the last 100 days. They treat candidates like this don't know how they treat their employees.