Boost mobile won't send me new phone or refund my money

I bought a phone from Boost up September 25th 2019 for 217,00 dollars, paid off early on payments . Dealt with support, customer service, every week since April, they will not and have not sent me my phone, And absolutely will not return my money. It's now been one year and I need help with where or what to do next.
Thank you very much