Still waiting for my order 3 weeks after payment

I ordered a kettle online and paid on 2nd May 2019 but I am yet to receive my order. I sent proof of payment multiple times through email, but no-one bothers to acknowledge. I have called customer services several times, and in the last call the consultant gave me her makro email so that I forward the proof of payment directly to her, yet still nothing. This has been a terrible experience from such a big brand, I am not making any other purchases from them in future. I hope i will receive my kettle eventually