Capitec messing up my life

I am dissapointed with service from capitec which is impacting my life heavily. june last I paid up my 2 loan accounts which were handed over to nimble collections i was sent the paid letters. This year January i started receiving calls from her yes solutions a collecting company collecting on behalf of capitec for the same accounts i paid off June 2019 I explained this to the consultant calling me and she saqqid i should take it up with capitec of which I did i called the call center and i was advised that i should email my paid letters i did so and after a few days i received a reply that said they only received payment for 1 account and i should contact nimble collections i did that and they told me that both accounts were settled. I visited capitec branch with both my paid up letters but the consultant told me she could not help as the accounts were handed over . I paid up loans hoping to apply for a home loan in a few years but capitec incompetence is delaying my process. I am being sent from pillar to post and its really annoying. .