Unsolicited calls and a popia breach.

We received unsolicited calls from this company offering to "assist" us with our debt. We only have an up-to-date home loan. What bothers me is they had info they could not have obtained without breaching the Popia act, including ID numbers, exact amount outstanding and what we've been overpaying. They also sent an SMS during this phone call that stated we gave permission for them to do a credit check. We did not consent to anything.