Bad Service and Lack of assistance

Myself, my cousin and a friend decided last year to travel to Thailand. Being our first time travelling abroad and the fact that we were 3 females we decided to use a travel agent to help us as we did not know the country and felt they would know better. Everything went ok until we reached Krabi and were told our room was on the 3rd floor and there was no elevator. I had an attack trying to get to my room. When we got there we found the bedding reeked and the towels had stains and holes in them. We emailed him immediately saying we could not stay there as I have cystic fibrosis and we told him we needed a place that was clean and safe for us to stay. We then had to find our own alternate accommodation which we paid for out of our own pockets because we were told we could not get refunded for the other place. I emailed saying we want to be reimbursed and that is when he stopped responding to my emails. It has been almost 10 days and no word from him. I have laid a complaint with STA Travel but they are not willing to assist us either. We feel ****** as we were showed the cost of the accommodation and it was half of what we paid STA Travel. I will not recommend them to anyone!!!