I'm in exactly the same situation. I ordered on 17.04 and am still waiting. The delivery time also changes constantly. One day it says: "approx. available in two days", the next day it says: "expected in 4-6 days" - really tedious. I don't want to bother with customer service either, they say that you have to expect a waiting time of 45 minutes at the call centre and a response time of 10 days by e-mail. Fortunately, the whole thing isn't urgent for me, but it's still frustrating when the delivery time keeps changing. Then they should just make more vague delivery times like "available in approx. 1 week" as long as they keep to this deadline, instead of always changing between 2 or 6 days and not keeping to the delivery deadline and overstaying it for months.