Serengeti Sunglasses - rep won't deliver

I am trying to buy a pair of Serengeti sunglasses but the local agents seem unable to get them to me. On 13 October, I ordered a pair through my optician (who I am not going to name because they give me great service and have been fantastic through this whole debacle). At that stage, I was told that i should have the glasses in two weeks or less. Time dragged on and on without receiving them until the finally admitted that the glasses had been lost by the courier, or so they say. That was a month ago, and still nothing. My optometrist battles to get hold of the rep and when she returns a call there is still no clear information. The rep undertook to phone me on Wednesday last week (14 December) and again today. Unsurprisingly, no calls at all! These are premier sunglasses and NOT cheap. their website is impressive and promises quality and service. Pity the local agents don't live up to the standard