Unacceptable service from Merchant Hunter

On 26th October 2019, I placed and paid for an order with Merchant hunter (also known now as Melody Clothing) my order was supposed to be a 35 working days to delivery. I then sent them a message on messenger on 19/11/2019 where they advise that my order was made from the pre-order/specials and it can take 25-35 working days. I followed up again Dec 5th then they say up to maximum 90 work days. I keep getting the automation then they keep saying 90 days. I requested a refund then got the same message re; delivery times. No order update was received. I then left it alone and waited my 90 work days which expired on March 6th, 2020. I emailed on March 7th ,no response. I message on Facebook messenger same day, no response. I finally received a response on March 10th, 2020...again the same message about my order was made up of this and that...now nearly 5 months later I get the same automatic message. I advised that this is unacceptable. No response. If the delays were because of the current situation then advise the clients. But do not leave them high and dry ,after already receiving their payments making us feel like we are doing wrong just following up on our order. I work with clients daily, also importing containers from Spain. My clients pay and I have to keep them updated on the arrivals of their materials.