Constant phone calls despite being listed with DMA

I have been phoned every hour today by Elite Mobile - at 10:13, 11:18, 13:27, 15:13 and 16:36. This happens despite me not answering the calls and being LISTED ON THE DMA'S OPTOUT REGISTER!<br> <br> I eventually got so annoyed and answered the call and asked the caller why they were calling so often. She told me this is \actually"the first time she's calling and launched into her sales pitch. I tell her I'm not interested. She then asks questions about how I access the Internet. Again I tell her I'm not interested. She asks more questions. I eventually had to hang up on her because obviously Elite Mobile tells their staff not to take no for an answer.<br> <br> Please remove my number from your database and do not contact me again. As I am listed on the DMA's optout register"