I must be missing it, I can't seem to find transaction history anywhere on my account. Just looking for a list of payments I've made to Jagex on my account.
The only transaction record Jagex make available is purchases during the past three months.
This can be found in the 'Messages' tab in account management.
You should search your emails for the Jagex confirmation of payment emails. This is the best record.
Your bank account will show payments as well but the information won't be as comprehensive as the emails.