"confused"

I'am so confused why do I as patient that is in full time work, not getting treated fairly,my potassium can be 2.3 to 8.0 and one one can help it just cant be that complicated I've been two and throw the hospital for four years,just had a letter from a CDU dated 13/01/15, after been asked by GP to go to CDU after a blood test in the morning saying my potassium was 7.0 only there two hour's this discharged letter can to day saying no follow up needed from GP how can i tell if my potassium go's to a high level which i know will not be good for me,also in the letter is say's Hyperkaemia is a new diagnosis and I'am under the pine unit,just shows the doctor was not hearing what I said or understand me, i told him my potassium as been not right for years so it not a new thing also I said poplar unit not pine,really not happy,