Im a tenant, i had no heating or hot water on and off for 4 months, only and electric shower fo wash.?

i had to use electric heaters, had a bigger electric big which i am now struggling to pay. a new boiler was fitted incorrectly by engineers which resulted in 5 seperate visits from 5 engineers, eventually the manufacturers having to come out. in time after 4 months, it came down to a problem with a pipe under the bath not getting rid of waste. so now i have a large electric bill. ive since left the property and i kept back 175 pound from my rent. now the landlady wants me to pay for a new carpet in the very large lounge due to me having a small accident with an iron dropping onto it, its not burnt, but just a small iron marking. she also wants all the carpets cleaning throughout the house at a cost of 120, plus extra costs for the lounge carpet, a total of about 350 pound. i feel this is really unfair due to the inconvenience of having no heating or hot water for nearly 4 months in which has left me in debt. i want some compensation!