Leroy Merlin review: gas heater 2

My name is vanessa chen, (email: vanessa.chen.[protected]@ gmail.com). I went to the shop with my husband to buy a gas heater for the shower. That day, last Oct., the shop had a special offor for the menbers with a event of providing customers with free spanish rice dish serving with free drink. We have talked to many assistants to get a gas heater consuming the gas from the gas tank ( propane) located in our garden. All of the asssistant speaks english, special one is supposed to be an expert in gas heater. We bought one which they suggested with 100% sure. Next day we got the plumber to fit the heater. After one day trying to put it on, the plumber said it was not the right one. We put the heater back in the box and brought it back to the shop. Suddenly no one speaks english and started saying like they dont understand my spanish. One of the manager called javier started to ask another branch and found out it was not the right one they sold me. He changed it to another one for me. Then, the plumber tried again to fit it. I supposed it must be right one now because it works all this time. However, i am not really happy is i have paid the plumber twice for putting the gas heater up and cost me 100€ each time for labour. Surely, you understand the problem is caused by your staff lack of knowledge of understanding what your products are. Please refund me the money for one day work from the plumber, otherwise i will take further action. Thank you