Water not reaching tank properly

I have installed new one HP jet motor at my home bore well is of 60 feet, due to water issues ... We had recently opened the bore, cleaned it and installed new jet and added 7 feet of pipe to extend the motor and there is water also till 15 feet in the ground.

But after all this also we are facing problems. Sometimes water doesnt rise up, we remove the air lock and water comes for sometime but again stops after few minutes. Is there some problem in the pressure valve or some other part of the motor? I practically do not understand the issue and tried to consult many plumbers but couldn't find a satisfying solution. I hope I can get some help from here.

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