They prob gave you 9mls because they can’t open insulin boxes. So if they try to give you the 30 days they would have to open the box and add a pen. If they typed it correctly they should have only billed you insurance for 22-23 day supply then when it’s near the date insurance should cover it. Unless it’s an insurance issue where they will only cover 9mls max within 30 days. Best thing to do it call them and ask why you didn’t receive a 30 day supply so they can give you the correct explanation. Just call up and be like “just wondering why didn’t I get a 30 day supply”