iPhone 5s rear camera replacement still not working ! ?

Sorry, but since you have opened the phone, Apple will not service your device anymore. You'll have to get it fixed by an experienced 3rd party repair shop, or ask for help int the ifixit forum. According to Apple, users are not supposed to service the phone.

If the hardware inside your iPhone had been damaged beyond repair, £ 200 would have been the costs for the phone getting replaced with a new or refurbished device. The price for an iPhone 5s 16GB bought at the Apple Store starts at £379.

Out-of-Warranty ServiceIf you own an iPhone that is ineligible for warranty service but is eligible for out-of-warranty (OOW) service, Apple will service your iPhone for the out-of-warranty service fee listed below.Please note out-of-warranty repair service fees from your carrier may be different than those listed below.

Model	Out-of-warranty service fee
iPhone 6s Plus, iPhone 6 Plus	£ 256.44
iPhone 6s, iPhone 6	£ 236.44
iPhone 5s, iPhone 5c, iPhone 5	£ 206.44
iPhone 4s	£ 156.44
iPhone 4	£ 126.44

The out-of-warranty service fee includes a £ 7.44 shipping fee, which applies only if service is arranged through Apple and requires shipping. All fees are in British pound sterling and include VAT. iPhone out-of-warranty service may also be available from your wireless carrier. Pricing may vary.When setting up out-of-warranty service, Apple will request credit card pre-authorization for the maximum service fee listed above. This amount will be deducted from your credit limit. The final service fee we charge will be determined during testing and may be less than the service fee listed above.Certain damage is ineligible for out-of-warranty service, including catastrophic damage, such as the device separating into multiple pieces, and inoperability caused by unauthorized modifications. However, an iPhone that has failed due to contact with liquid may be eligible for out-of-warranty service.Apple reserves the right to determine whether or not your iPhone is eligible for Out-of-Warranty service. An iPhone that is repaired or replaced has a 90-day limited hardware warranty or assumes the remainder of your standard warranty or AppleCare product coverage, whichever is longer. Please see Apple's Repair Terms and Conditions for further details.If you have an iPhone that Apple determines is not repairable, you may wish to contact your carrier for other options.

Apple's One Year Limited Warranty and AppleCare product benefits are in addition to rights provided by the EU statutory warranty. Learn more.

copied from Service Answer Center - iPhone /UK