Regarding the depth of the borewell

Dear Sir,

We have recently drilled a borewell. Water started coming at 20 ft itself. And the borewell was dug upto 125 ft with slatered casing pipe installed till 125 ft. We planned for 250 ft depth borewell but the borewell company has stopped at 125 ft itself saying that we have reached the rocky surface and ground has a good water source. Our neighbours dug till 250 ft. Will it lead to a water problem in future due to low depth? Please advise.