walmart.com zerone (seller) walmart didn't give me a refund excelsior mn

I bought a hair regrowth helmet at walmart.com in October 18th. In January the helmet didn't work anymore (lights didn't turn on). I asked for a refund or another helmet, and what I had is a couple of e-mails telling me to change the power cord, change the battery, etc. When I took the helmet apart to try to change the battery, and sudelly, the helmet turned the lights on again. So, I explained the situation and told them that if the problem comes back, I would ask for a refund.

Than, a couple of weeks ago, I faced the same problem. Then, I contacted walmart again, asking for a refund, and again, received a couple of e-mails recommending me to fix it myself. I said that I tried, but the helmet didn't work and I'd like a refund. They sent me this incomprehensible message "thanks for your kindly reply for this situation,we would like to issue you the refund here is this fine? may i know if you agree? waiting for your early reply best wishes", and no more contact or email.