Customer rights violated

My partner took up a loan of R1500 with lewis in February last year. Unfortunately she lost her job the end of that month and was unable to make any payments. The Sales consultant that helped her called everyday to try and make arrangements but since there is no income she could not fulfill that. James, a sales consultant from Lewis stores in Zeerust then took a decision to call a relative of my partner whom by the way is not in her alternative contacts list in her contract and share confidential information about the status of her loan. Then yesterday the same Sales consultant drove my house and requested my partner to make a payment or arrangements for the loan. I have a copy of the contract and nowhere do I see a part that gives them permission to visit our residence to come do collections. Lewis has a NCR certificate and that protects both Company and Consumer and right now I feel my partners rights to privacy are being violated. There is a legal department that handles all non paying clients, not a consultant!! This is below pathetic from Lewis because the loan she took is an unsecured loan and as a company they must know what that means how that is handled