The contributions paid by you and your employer aren’t directly related to the pension you accrue. Your pension in alpha is calculated as 2.32% of your pensionable earnings.
As alpha is a defined benefit scheme the pension contributions are used to cover the cost of the scheme and do not equate to how much pension you have accrued. These contributions aren’t invested anywhere, but are used to fund the scheme.
Our alpha Contributions Explained guide contains more information.