Chosen Solution

hi, i have some issues with my iphone 5s 16gb. I have been facing some blue screen of death and the phone restarting several times. After some weeks, the phone stopped switching on and sometimes it would just restart on the apple logo. I sent it for repairs and i was told that the internal memory has crashed. Can you please help me and tell me if it can be changed. Many thanks

It is possible, but involves expert level skills.