Harassing calls with no answer

I have recently asked a company to mediate my debt for me and they will be paying my account on my behalf.After phoning and notifying Direct Axis on the 01.02.2016 informing them that the mediation company will contact them i am continuously being harrassed with over 12 calls a day and when I answer there is no body that speaks I did manage to hold on log enough on one call to find out that these calls were from direct axis.please can someone make a note on your system that I did call in and notify you but it seems as if these agents have no work besides calling 1 client 10 x a day and not talking