Thanks for your reply!
I talked to the company about it. They told me “my brain” needs a few months until it gets used to the new hearing aids! The trial is only two weeks. What if I wait for a couple of months and no improvement is noticed/ heard? I paid a big amount of money and I can’t afford to pay for another pair of aids later.
Other people told me, this is “my problem” because I’m expecting too much from the hearing aids which are limited by my hearing impairment.
There is inflation in Egypt and many devices, not only the accessories of hearing aids, are not available in the market.
Finances would be the main problem to seek a solution in another country.