I got a call from TT company, who needs invoice copy of website development we done in last month.
Please check the sentence.
Okay, note: "who" is a person but a company is a thing. So, either identify the caller or change the language. Here is my suggestion: I got a call from TT company (today/last week).
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Okay, note: "who" is a person but a company is a thing. So, either identify the caller or change the language. Here is my suggestion:
I got a call from TT company (today/last week). They need a copy of our invoice for the website development we did for them last month.
Clear?