Creality Ender 3 Max Neo 3D Printer Combo

It all started well with half a dozen successful small prints, which I managed to design using Fusion 360 and sliced with Cura. But then I didn't use it for a few days until a friend came around who is interested in buying one and I tried showing it off. I tried to print the sample duck but very quickly created a birdnest, which broke away from the base plate. Tried multiple times but same problem. The filament seems to be flowing uncontrolled out of the nozzle, and big blobs get in the way of the print head. I'm looking for solutions on Youtube but haven't found anything yet. I've tried heating the bed more - went from the preset 60 degrees to 70 degrees but made no difference. The nozzle was set at 200 degrees - using the PLA filament that came in the box. Bery disappointing. The jobs I did first up worked out great but I'd like it to have worked smoothly for a bit longer! I didn't change anything.

Currently getting a replacement power supply from your company very annoyed as I am not able too track it so I have no idea if it’s actually coming or not, personally I think the service of the company needs improvements as it is quite frustrating to be sent a broken printer and have too replace the parts yourself rather then send it back and have the whole printer replaced as I am not qualified to be replacing that and it is the company’s job having said that I am happy knowing that I am able to resolve the issue thank you.