PRESCRIBED DEBT THAT NIMBLE WONT REMOVE

Good day everyone. I have a complaint against The Nimble group. NIMBLE is harassing me over debt that has prescribed and they are trying to get me to acknowledge this debt. I have told them the accounts they are collecting on have prescribed as it is ******* trying to collect on a secondary debt that arouse from a debt that has already prescribed. I feel Hellopeter is my only way as they are not hearing me even after I have told them that this debt has prescribed and they should remove this account and stop calling me as they are calling me on a daily