What flower is this?
The leaves are most similar to this Mandevilla

It may be a hybrid periwinkle, in France and UK there are blue ones in wild and there are pink ones i.e. in Madagascar. If it's a periwinkle you can tell by the fruit and veins of the leaves. It can be a variant of Vinca minor. It has evergreen type leaves, it may be tropical. It is also similar to the Oleander family. Clematis and Ipomea have new foliage every year. 

Also see this.