So something is seriously wrong then.
The next thing I would try, is a factory settings reset. It will wipe out all White Balance settings and such things among your preferences, but will not erase pictures at all, nor alter the real-time clock and date settings.
Would you like to try that?
Also, about your camera's history:
How old is the camera? in months or years since you bought it.
Has the camera been dropped or otherwise subjected to mechanical shock(s) in its lifetime?
Has the camera been operated in or subjected to, temperatures below 32 degrees F (freezing point) or above about 100 degrees F ?
Has it ever been subjected to a humidity higher than 85 % or gotten wet ?
Has the camera been operated in a gritty or sandy environment, such as a beach, a seaside, a construction site, or the like?