I'm afraid, you'll have to get the phone replaced. If the case is bent that much, a new screen will not fit as well. But that would be Apple's decision to make. Visit an Apple Store, Apple Authorized Service Provider or contact Apple Support to get it serviced.
Find an Apple Authorized Service Provider
iPhone - Contact Support - Apple Support
Repair and replacement costs depend on your iPhone model and your AppleCare product coverage. Apple will run a diagnostic test to determine whether your iPhone has experienced additional damage. If it has, or if it needs other repairs, you may need to pay an out-of-warranty service fee. Accidental damage isn't covered under the Apple One Year Limited Warranty.
Model |
Screen repair cost |
iPhone 6 |
$109 |
iPhone 6s, iPhone 6 Plus, iPhone 5s, iPhone 5c, iPhone 5 |
$129 |
iPhone 6s Plus |
$149 |
Plus a $6.95 shipping fee, if required. Fees are in USD and exclude local tax. Pricing is for service through Apple. The final service fee we charge will be determined during testing. Pricing and terms vary for service through an Apple Authorized Service Provider.
If your repair isn’t covered by Apple’s One Year Limited Warranty, AppleCare+, or AppleCare Protection Plan, your iPhone might be eligible for out-of-warranty service. For example, liquid damage isn’t covered by warranty but might be eligible for out-of-warranty service. Some damage isn’t eligible at all, for example if your device has been broken into multiple pieces. See Apple’s Repair Terms and Conditions for complete details.
Read Apple’s Repair Terms and Conditions
Model |
Out-of-warranty service fee |
Battery service* |
iPhone 6s Plus, iPhone 6 Plus |
$329 |
$79 *available only if battery fails Apple’s diagnostic test |
iPhone 6s, iPhone 6 |
$299 |
iPhone 5s, iPhone 5c, iPhone 5 |
$269 |
iPhone 4s |
$199 |
iPhone 4, iPhone 3GS, iPhone 3G |
$149 |
Plus a $6.95 shipping fee, if required. Fees are in USD and exclude local tax. Pricing is for service through Apple. The final service fee we charge will be determined during testing and may be less than the service fee listed above. Pricing and terms vary for service through an Apple Authorized Service Provider.
copied from Service Answer Center - iPhone