Botched my bar stool unnecessarily

So my just under 2 year old bar stool started making a "snap-like" sound this year. I took the stool in to the Red Apple in City Deep.... Since I purchased the stool from there and I didn't want to take it anyway and have it RUINED! Was hoping they would be able to assess and fix where necessary, I even made it clear to the lady that I would pay if I have to for a repair rather than waiting until the stool breaks! The sound came randomly (not while I was at the shop not warehouse with the stool), fear of the R3400 stool breaking led me to take it to "the right people"(or so I thought.... That they sold me the stool they would know what to do and have the best interest of the chair at heart). The lady in the warehouse said they could mend it, as the back rest was slightly loose. She said it was out of warranty but they would just mend it a bit (where the backrest attaches to the rest of the stool). Within about 2 hours of leaving the stool I received a call to come collect the stool the following day. I arrived and found that my stool was stable... But also had knicks and scratches all over on the seat, the soldering in the back highly untidy and a big scratch down the back of the stool... To which, one man said the guy soldering it "made a mistake"

My heart was sore.... Made even worse by the lady who said "well you know that when things get fixed they don't look the same. (before I asked for it to actually get polished since it had even seemed more dull)" we polished it..... It won't look the same ahain" "you know we did this for you and we didn't even charge"

Now my set of bar stools is ruined with this scratched up bar stool!

1.why were they not neat and not protective of all other surfaces that were not being worked on 2. If they were unsure of mending it neatly why did they just not tell me they can't do anything 3. How must I trust the people I got the stool from ever again.... If such happens!!!!!!