The frequencies are 100mhz outside of those devices, but still I have problem to get good throughoutput problem is mainly with receive.
Why, what is the problem? Changing channels doesnt helps...
Is any way to solve it?

Try some antenna shielding. These signals are too strong even if they are on another frequency.

The antennas are in the fron of my antenna, there is no way to communicate with competition ...and the clients of me are behind competitors antenas...