My sprint iphone doesn't work in my house what should I do?

I've been to the Apple store they've told me its not the phone its my service. But when I call Sprint they only make me reset my network settings and that still doesn't work… I can go less then 5 miles from my house and my phone will work perfectly fine… Any advice on what should I do

There are no signal in your area so please complain the help line person.

Nothing will make signal get to your house, if it doesn't currently, other than a tower being built. Talk to their cancellations department to see if they'll waive your contract.