If Allah takes away the ability that allows you hear and see, and removes understanding from your hearts, who, or whatever entity you may choose, is able to restore it to you , as you claim.
The ability to recognize and follow Guidance is in our nature. When we ignore this inner urge, or become dead to it, only the Creator can show us how to reclaim the excellent life experience and happiness that He created us to have.
Sincerity removes spiritual blindness and deafness. Those who remain sincere may experience exceptional difficulties and challenges, but the Creator gives them understanding, spiritual sight and hearing, and their success is assured.