I have had a horrible experience with ZK. My GP said that the special vaccination for my 1.5 year old daughter can be claimed from insurance, after first paying at the apotheek. When I started the claim, I was just asked to upload the receipt, but there was no option to explain the reason for the cost. Then you rejected the reimbursement without stating any reasons.
I started a support chat, but your supporter said that she will look for an English colleague and asked me to wait. Then after a minute or so, the chat was terminated by your end. I feel pathetic to be your customer and unfortunately have to bear with you for another half year.
Will definitely share my experiences with my expat communities so that the new expats at least look for other options than ZK.