Not getting any of my VISI magazines delivered.

For the past couple of months I've had to call the call center to notify them I haven't received the latest issue of VISI AGAIN! I received maybe 2 that I didn't have to call for. For the others they just moved my subscription on by a month every time. Last month I called in to say I haven't gotten the last 2 issues. After days of fighting I eventually got one of those 2. The other one they got wrong so now I have 2 of the same issue. I thought that after this they would finally get it right. They told me the next issue will be delivered on the 9th of April. It is the 11th and still no magazine. Please urgently cancel my subscription. You are just wasting my money and my time. Your delivery service sucks!