If your service is the same as everyone else's, or appears the same, or you portray it as the same, then potential clients will look for the lowest price.
Raise your rates. Create demand. Separate yourself from the masses. Create your own unique identity and persona. Offer them a customised service!
Don't copy other people's ceremonies and bits - this only makes them common - and common is average - and average only commands an average price.
Be exceptional - that's how you command an exceptional fee.
And if couples are price-shopping you, maybe you're not exceptional?