You're right. How can you trust a lawyer who once set you up? If I were you, I wouldn`t contact them again. Unfortunately, not all law firms justify the trust, many of them exist only to make a profit in an illegal way. I`m very careful when choosing a lawyer, and if I need help, I ask for recommendations from friends and relatives. For example I was advised https://bsmlaw.com.au/our-services/arabic-speaking-lawyers/ and I wasn`t mistaken to turn to them, so I'm not afraid to advise you. Also, be suspicious of those who don`t ask for payment or work for cheap, it always leads to troubles.