Anyone else having problems with their Iphone5C charger?

I've only been through 2 chargers at the moment. My Iphone5C is under year old so I can't see why I'm having troubles. I've check the bottom of the Iphone where the charger goes and I don't see any dirt/dust in it. My chargers had both lasted about a 1-2 months. I try not to wind the charger up too much as I know it can affect the wires. I don't think it's my Iphone as I have to hold my charger in a funny angle just so it'll charger, even sometimes after that it'll give up on me.

Does anyone know how long Iphone 5/C chargers are expected to last?
My first charger: normal, came with phone
Second charger: ordered off of ebay, fabric 2 metres long.(I made sure the seller was safe)

It doesn't cost a lot for chargers but it's just a pain to deal with as I never no when it's going to give up on me and I never have a spare:/
If anyone has any solutions I would really appreciate it.

Hi time to understand built as cheap as chips hence why they don't last.

My first and only charger for the 5c has been running fine for the 6 months I've had it. I have never wrapped the wire or anything though I'm always unplugging it etc to use it as a usb cable for the pc. As for the ebay charger you are always going to be taking a gamble with non-apple products. I'm sure you could go back to apple and ask for a replacement as I believe it is included in the warranty.