@MarkT
Thank you 
I do have a bmp280 pressure sensor which I can fuse the data with, also a GPS but getting it to work is too frustrating. So barometer seems to be the best method for me.
How would I go about sensor fusion, I can calculate the height with the pressure sensor but how would I go about combining this with the drifting accelerometer data. I want to also delve into using Kaman filters to try and smooth my data but there doesn't seem too much helpful pages on the internet.
Thank you for helping with the reasons as to why my sensors and data isn't the best and I'll do some more research into sensor fusion
thank you -Harvey