Insistent and constant 'silent' calls

I recently took up financing with MFC for my new vehicle but as of late I have been receiving a number of calls every single day where the call centre agent will call me and for the entire duration of the call - which ranges between 10 and 30 seconds - stay absolutely SILENT! I don't know if they are trying to pull pranks or look like they are working but they are wasting my time especially during working hours and my patience is becoming less by the day. These guys will call me at least 3 to 5 times a day and when they DO say something they always try sell me something. No matter how many times I tell them I am not interested, they keep on calling back. I took up financing with MFC not a open line for selling ******* to me.<br> <br> The numbers they have used so far are as follow:<br> +***0<br> +***9<br> <br> I would really appreciate if this would stop immediately and never happen again.<br> <br> Regards