@Celia my machine is an Alfa Next 30, I bought it about eight years ago from my local Franklins to replace my ancient Merritt which gave up the ghost after 35 years, the last 20 of those in the cupboard.
It was not expensive but it had sewn anything from chiffon to denim with no problems. I an very fond if it but have been thinking about buying a more expensive machine but with the lockdowns last year and my dodgy hips I haven't done anything about it except lots of research and ogling of some of the fancy models. I'll phone Franklins tomorrow and order a new one because I don't think it can be repaired.
I used it this morning to sew the waist facing on so next I am going to give the trousers a press. When the hems are done I'll get some photos taken of me wearing them but because my posture is so one sided they might not look great.