How are you today?
If all else fails with getting a replacement or you don't want to replace all of your software you can easily fix it yourself.
I just recently bought a kit for the same reason for an iPhone 5 and was able to be up and running within 20 minutes. I've always heard that you could not fix them your self, but apparently that is incorrect.
I used tvc-mall.com, but there are many other suppliers of Apple OEM parts, this is what it cost me.
tools are Item NO. TOOL-352 $11
buttons: Item NO: I5-9152A - Black $1.21
Item NO: I5-9152B - White $1.21
"Home Button Holder" Item NO.: IPHONE5-921 -if that's what's broke -$0.23
Good Luck, also per the agreement of using this forum "I must tell you that I have no connection to the seller I used to buy the parts and will receive no financial gain"
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