The former Wilfrid Laurier University teaching assistant says she was banned from Twitter after a heated exchange with a transgender woman

A heated Twitter exchange has landed Lindsay Shepherd with a permanent ban on the social media site.

The free speech advocate and former teaching assistant at Wilfrid Laurier University got into a back-and-forth with a transgender woman, indentified as Jessica Yaniv, after Yaniv hurled insults towards Shepherd and her infant son, and made remarks about Shepherd's genitalia.

Shepherd says she deleted her own portion of the exchange the next morning, but the damage was already done.

In a seven minute video posted to her YouTube page, and deleted Tuesday afternoon, she says she tried to appeal the ban with Twitter, but was denied.

She says the result proves that "trans people like Yaniv are untouchable."

Yaniv took to Twitter to celebrate Shepherd's ban.