why is pip sent to miss havisham's home

Pip essentially goes to Ms. Havisham's house to entertain Estella. He is treated badly and is made aware of his low class status.

Miss Havisham wants Pip to come and play at the house. Whether or not she's interestd in Estella joining him at play reamins to be seen.........

"She wants this boy to go and play there. And of course he's going. And he had better play there," said my sister, shaking her head at me as an encouragement to be extremely light and sportive, "or I'll work him." (Chapter 7)

In Chapter 8, we see that it is Miss havisham's wish to see someone play....

"I am tired," said Miss Havisham. "I want diversion, and I have done with men and women. Play."

I think it will be conceded by my most disputatious reader, that she could hardly have directed an unfortunate boy to do anything in the wide world more difficult to be done under the circumstances.

"I sometimes have sick fancies," she went on, "and I have a sick fancy that I want to see some play. There there!" with an impatient movement of the fingers of her right hand; "play, play, play!"

When Miss Havisham calls Estella to play cards with Pip she insults him mercilously........ Miss Havisham's response....

"I thought I overheard Miss Havisham answer - only it seemed so unlikely - "Well? You can break his heart."" (Chapter 8)