How to fix my htc 10 from bootloop? and/or recover internal/ app data

i have an issue with my phone i desperately need it fixed and/or backed up as well, its an HTC 10  ,and cant get it to boot up,i have researched the problem, it cant get into recovery mode only bootloader, wont charge properly,when cable connects,it begins to boot loop, when i turn it on ,it bootloops until battery dies, have changed battery and charger port. i haven't yet to install software or able to back up phone using a program like dr.fone or other recovery programs that can install a flash. really need this phone back working to stop boot loop, it is not rooted so i havent tried other ways to install anything to prevent the bootloop. i have dont the button functions that involved holding down volume and power button. can only go into bootloader, other functions only attempt but do not follow through thus back to bootloop