Poor service and denied refund

I ordered a baby monitor on 21 Jan for my baby due in April. After a week of trying to connect to the unit and even calling the technical team at the manufacturers for assistance I was unable to get the item to work so I requested a return. I received no feedback. I followed up via email and calls and was informed that someone would contact me from the supplier to assist. No one contacted me. I followed up again and was told the unit would be collected for assessment. The unit was finally collected mid Feb and sent for assessment. Once again I waited for feedback and received none. On 1 March I followed up again. At this point I just wanted a working monitor and requested a refund. I was informed that the error could not be replicated. I find this ridiculous as no one even contacted me to find out the details of the error or steps I followed. I once again requested a refund and with no context or conversation, was informed that a refund is not possible. This is despite following the exact process indicated for refunds. Almost 2 months later I have no resolution and I am now a few weeks away from my due date with no monitor, no refund and the worst customer service experience ever!