Grievance Letter

I need grievance Letter like this this example
For the last 6 months I am struggling with work because my disability
The Equality Act 2010 (the Act) says that I am protected against unlawful discrimination at work in relation to my disability.
Discrimination arising from disability is defined in the Act as;
• Unfavourable treatment, because of something arising in consequence of that person’s disability, and
• It cannot be shown that the treatment is a proportionate means of achieving a legitimate aim (‘objective justification’).
I believe that treatment I have experienced cannot be objectively justified because reasonable adjustments have not yet been fully considered or implemented.
Under the Act, employers are under a duty to make reasonable adjustments for disabled persons.
The duty to make reasonable adjustments has the purpose of addressing a situation in which a disabled person is placed at a substantial disadvantage, in comparison with persons who are not disabled. Any adjustments made must be reasonable to do and can take 3 forms:
• A change to a provision, criterion or practice
• A change to a physical feature, and/or
• By providing an auxiliary aid.
If it is reasonable for the employer to make an adjustment then it must be made. Non-compliance with this duty results in a failure to make reasonable adjustments which is unlawful under the Act.
The adjustment/s which I consider that you have failed to make are; my software and head phone
I have tried resolving this matter by speaking so many time every time I have been told next week, nothing happing from April to October is 6 months for just to install software and head phone, I have taking more than 20 days paid and not paid that I don’t need cost me money know I am depress my GP give me sick note to stay out work, I would like to formally raise my concerns through a grievance in accordance with the company’s grievance procedure. The reason for this is to investigate the concerns which I have raised, with a view to resolving these as soon as possible.
I understand that a grievance meeting will be arranged in which we can discuss this matter and try to resolve these concerns. I also understand my right to be accompanied in this meeting by a colleague or trade union representative.
I look forward to receiving your response in writing within 14 days or in line with the company’s grievance procedure.
Yours faithfully,