I subscribed once - and only once to one called 'DIY Profile'
As you say, you've only got to miss one edition, tell them, they say they sent it so you need to wait, by the time you've waited they tell you they're out of stock.
My DIY Profile is complete magazine wise but I never did get all the reference cards.
85 x £7.99 plus teh £1.99 for the first one = £681 !!!