Give feedback of my writing.

當你講述過去的經時,請你用過去式.你這封是投訴信,講的是過去的不快經歷,必要用過去式
First, (was )the water supply problem. (The )the water pipe has been (用was) broken. When I turned on water (水龍頭tap)that day, the water discharged from the pipe. It take (took) me two days to find a repair (刪去repair) worker to repair the water pipe. The cost of repairing is (was) $500. I think (thought) this is (was) not my responsibility to repair it, as I am only rent for the house. (I only rented the house)

Second, the heating water machine cannot work properly. I call for( called NOT called for) the gas centre, and check (checked) for me. This is (was) free in charge (Free of charge). But after that, the worker from the gas centre said that I have (had) to buy a new one, because the model is (was) out-dated. It costed me $1300 ( to buy a new one之前你已說了是新的,所以可以把to buy a new one刪除). I also think (thought) it is (was) not my responsibility to buy a new water heating machine, as I am only renting the house (I only rented the house if not 2 verbs).

Third, the chair and table of the house are (were) extremely old. Some part (parts) of the chair(chairs) is(were 你用了some要用番plural) broken. I have (had)to replace them by buying new chairs and table. It cost (costed me) $2000 to change a new set of table and chairs . I also think (thought) that this is (was) not my duty to buy new chairs, as I will (would) move to other (another) place to live after renting this house for some years.

The light (用bulbs好一些) is (was)not light (用bright比較好) enough, and I think (thought)it is (was) not convenient for seeing things clearly. I have (had)to change a brighter lights. It costed me about $200 to change the light bulb (用it).

I want to express my angers [anger] (angers無plural form的)of all the equipments [equipment] (equipment無plural form的)supplying here. Please give me a reply about the house, and give appropriate follow up suggestions to me. (我會成句改為.Please give me appropriate suggestions and help me to follow up my case. I am looking forwards to your reply.)
if you want to use the plural form of equipment, you can use pieces of equipment.
Yours sincerely, Ms Cheung

I hope you will find my correction helpful.

Some grammatical mistakes. The content is OK.
But I did write a complaint letter before. It seems that mine is a bit different from yours. Firstly, I have the department address on the top left corner and mine address on the top right corner. Then after "Dear Agency Officer", you should start a new line. Next, you should write the title. For example, "A complaint of …" and should underline it.
Lastly, before "Yours sincerely," you should also start a new line and put it on right hand side. Very lastly "Ms Cheung" should be on the next line under "Yours sincerely," .
Hope this advice helps you. =]