Onlineprinters interview questions

Normal questions about my CV and why this company and the usual HR questions! Nothing technical as such! I was even asked if can handle cyber security tasks, for a Data scientist / analyst. It was a pleasant interview overall and they told me that they will let me know after 2-3 weeks! Now comes the twist, it's been more than a month! Not a single email! Contacted them twice, but still no reply! I really have no idea why some companies ghost candidates like this!