I'm not sure exactly what you are describing. Did you pre-order various CE's and not get the promised goodies? If so, ask Support if they can correct this.
Or did you buy the CE's after the content was released? In which case, by definition you did not pre-order and therefore would not be eligible for things given expressly to those who ordered in advance of release.
The pre-order goodies are usually included in the Collector's upgrades you can get in the Crown Store.
If you didn't pre-order the chapter and then bought the collector's edition, you might not be able to get those. If you didn't pre-order and just got the normal though, you can buy the upgrade in the Crown Store to get all the items. It's usually available a bit over a year after the chapter releases, a few months after it converts to DLC.