'How can I make you smile' se voet...

My initial experience booking was pleasant. However, I am now trying to upgrade my accommodation type and possibly adding 1 day but no-one can help me. The site allows me to change the date but does not apply the 10% discount I am entitled to as loyalty member on status blue. I have called ***, ***, 0860 223 75 and *** more than once. I either get transferred, cut-off or given one of the numbers I already called. For all this trouble, you should give me the upgrade for free. I've been on the phone for at least an hour and each time the phone gets answered 'How can I make you smile' and with each call my smile disappears more and more and more...for a simple upgrade...I even called Magalies directly but they can't help because I booked through first. (which I can understand). I was promised a call back during the day but these bookings go on a first come first serve basis...who says there is an availability when I get called back...and based on my experience with the calls...who says I even get a call back...it really shouldn't be this difficult...