
One possible version:
Dear Sir or Madam,
I went to your marine park with my friendsyesterday and visited the souvenir store.However,sorry to say I was disappointed with thesouvenirs and the service there.
The souvenirs in the store were too expensive.And the shop assistant was rather impatient while Imade my decisions about what to buy.What'sworse,she even laughed at me when I was about toleave without buying anything.
I think the souvenirs and the service will alsodisappoint other customers.I hope you will takemeasures to make improvements.
Yours sincerely
Li Hua