Parkdean Resorts complaint: Entertainment passes

We booked a private caravan 28th June 2021 staying Monday to Friday, 4 adults
Once we got to the resort we popped into the office to purchase some entertainment passes
Once the employee established we had booked privately she completely changed her attitude towards us
She snapped at me to say as I hadnt booked through Parkdean resorts the pass would cost £19.99 per person for the stay and then went on to tell me that we wouldnt be able to access the swimming pool and wouldnt be able to have access to any other activities, didnt explain why, I asked what we could use the passes for, she said to get into the bar ~ restaurant and entertainment
I questioned why it was so expensive as we couldnt use half of the facilities if we had wanted to,
She just said if you do not book through parkdean resorts that’s the price!
Then asked me for almost £80 for the 4 passes
I said we weren’t prepared to pay that price just to spend money in the resorts bar and restaurant
She then asked if there was anything else she could help us with and before I could answer had asked the person behind me if she could help them
It had been made clear if you do not book through the company that you are not welcome on the resort..
This made no sense to us at all to spend almost £20 each to get into the bar restaurant and entertainment to spend our money! The resort missed out on us spending at least 5 to 6 hundred pounds in the time we were there.
We would have all had breakfast and evening meals there, Costa coffees and alcoholic drinks as well as played the bingo. We obviously went outside the resort to eat and drink as we were made to feel so unwelcome.
It was also very embarrassing as everyone else in the queue was listening. We are far from frugal but to be told that’s the price even though half of the facilities were unavailable was extautionate, to spend money to get in the bar to spend money?????