Can anyone check my grammar,grammatical mistakes and sentence structure please?

With reference to the above-mentioned subject, kindly give us the latest update on our generator -12-539-62 - pending action since September 4, 2011. We urge you to provide us with immediate assistance, as it will enable us to proceed with our work in a timely, efficient manner. Thank you, in advance, for your attention to this matter.

Miss Maria Dix
94 Alexandra Court
Empire Way
Wembley, Middlesex.
HA9 0QZ
07506 567753
dixmaria@ymail.com

30th November 2011
Dear Sir/Madam,
Re: Application for the Administrative Assistant/Secretary.
Please accept my application for your successful company in West London of matching skills, as I have customer care skills, working as care worker.
I have excellent customer services experience with an attentive and  listening approach to customer care. The role consisted of accurate diary recording on a day to day basis to  status patient care. I had to escort the  patient to the practice, keeping an organised and efficient diary system, to respond to patient symtoms, with an independent approach to the patient’s current state of health.
I have  three years of  administration experience combined with my receptionist experience of I.T. computing. (I.T. certificate obtained at college). I possess knowledge of word and can produce documents such as (eg spreadsheets, word documents, memos & faxes. I once worked for a computer company and had to assist in typing documents for the secretary, to meet deadline work.
I enjoy working in a busy environment with  effective transferable caring experience, to  develop within the role to deal with correspondence, with a hard working, reliable approach to my work.
I  have a friendly and professional telephone manner to create a warm and presentable working environment to any organisation.
I welcome the opportunity to meet with you and discuss the role in more detail.
I look forward to hearing from you.
Yours Faithfully,

Miss Maria Dix