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i[use both expression of greetings Sir/Madam for formal letters]
ii[recent purchases] iii[I had ordered] iv[after I had unpacked the package I found out that/I was highly disappointed with the services and quality assurance from the company]
v[it is my humble request to ] vi[looking forward at the earliest response]
vii[yours faithfully]
work more on grammatical errors /use range of lexical terms to explain points and work more on practicing variety of topics.
keep writing!
