Anyone using hearing aids for the first time, or updating from old to new technology, should realize that it takes time to adapt to the new sound. Studies have shown that it takes approximately 6 weeks for your brain to adapt to the new sounds that you are hearing.
During the first 2-3 months with your hearing aids your audiologist will increase the level of sound until they are finally set at the level best matched for your hearing. However, this does require time -- and patience. It is common for the sound to initially be set lower than what you need, sometimes 50% lower. Over several weeks the volume is increased until it finally gets to the appropriate level. The level of sound is adjusted based on your comments about sound level, quality, and the benefit that you're receiving.
If you're not doing well then you must tell your audiologist so proper adjustments can be made. Using hearing aids for a few days and deciding they aren't working for you isn't a fair trial. Do yourself a favor and ask for adjustments to address the problems that you're experiencing.
Dr. Scott