VERY *****!!

I believe that you have instructed some Bankol International to call me and collect money owed to you which i HAVE BEEN PAYING but that is not my complaint, my complaint is at being is that they will call you with like different 087 numbers and when they cannot get a hold of me they call me with a certain unregistered cellphone number, I know this because I have done my investigation on the number and it is unknown which makes one wonder because it is then not legitimate, you have me worried that after all the paying I have been doing with this BANKOL you as Nedbank and come back say I have never even paid a cent, because if the cellphone number is not registered, what else could not be registered, are they genuine? and why is Nedbank associated with such, when it is such a huge and recognized legitimate financial institution, could you kindly investigate this and fix it.