Over dying caused my hair to fall out

just over a year ago I dyed my hair from black to blond it was previously bleached in the past also,. when I applied the bleach my hair turned to a glu type texture. I paid one hundred and eighty pounds to save some hair and to dye it all the same colour. before I lost my hair it was past my shoulders, when this happened it was really short and spikey! im not happy with my hair at all will I be able to ever change the colour again? thank you

Sure. First let your poor stressed hair grow back out without the torture you have put it through then try not to bleach the hair which drastically thins it. The dye you are using should be a non-ammonia based dye and I would really suggest looking into hair glazes as another alternative.