Will I be refused to enter HK even though I get HK visa?

Hi, I'm Panamanian residing in Singapore with my husband french citizen (he doesn't need entry permit) we will be visiting HK for 3 days in March, I need an entry permit and I have 3 blank pages but the embassy here is saying that the 1st blank page next to the photo page doesn't count and the last blank page with the panama's signature also. Then Panama embassy here added 1 more page at the of my passport and HK embassy here only wants to grant me the entry permit if I write a letter where I stipulate clearly that they won't be responsible in case the HK immigration reject me when we arrive there. We provided all the others documents like proof of sufficient funds...
What should I do now?
Do you think I might be refused to enter HK by immigration even if the entry permit is granted?
Thanks