theres a few options depending on your skill
1. take it to a PC repair shop
2. hot air gun (slightly risky if your not careful)
3. buy a back plate as it dosnt use the ports on that side of the board (v3 only option i think)
4 very very gently bend the pins down slighty on the eithernet port where its suppose to connect whith the board and clamp it in place with some G clamps (this is the quickest and easiest aslong as the point meet the right solder points it will work
5. RMA it or sell it to me for 0.5
also if your in the UK ill fix it for free is i get to mine with it for a week