Unfair listing on credit beaurea

I would like to understand how on my credit report I was listed as a late payer for 4 months last year when I have not missed a single payment since I've started my contracts. This is negatively impacting my ability to gain credit. I've been a loyal customer for almost 2 decades and this is the kind of stuff that makes me reconsider my time with your company. I now need to go through an unnecessary and tedious dispute process to resolve this. You created a problem in my life that was not even real. Thanks a lot.