This is why your English proficiency is bad. Have you considered these options?

Chidudem is my colleague at UI undergrad. She is an amazing lady with a good authority on English. Besides, she is notorious for making the complex look simple. You can always entrust her with the English task. She won't disappoint!

I'm Prisca, a friend of Chidubem. She's very good with English, especially English grammar. Apart from that, she explains really well to her friends if we don't understand whatever we were taught. I'd give Chidubem 100% recommendation to teach English.