Here are a few points to consider before attempting to place your order again:
There are issues surrounding the use of Microsoft packages on Macs, as Apple has stopped supporting Internet Explorer since the introduction of Safari. The website is not supported by Internet Explorer on a Mac. If this applies to you, upgrades to Safari or Firefox on the Mac will be needed. We would also advise you to try deleting your cookies/caches on your device.
If you are still having issues, please reach out to customer services and ensure you have the following:
1. Date/time you attempted to place the order
2. a screenshot or note down the error message you are receiving
3. The browser you are using
4. The device you are attempting to place the order from