Fix Fault Proline

fitted a new proline gas hob,back two burners work ok,front two ignite,but as soon as you let the knob go the flame goes out any suggestions would be helpfull

The outer glass got smashed on my proline oven door. We have got the replacement glass but are not sure how to fit it

Where can I buy a second shelf for my Proline gas cooker (bought in France) for Type IQQ510HB CE51BM1940 Model CUG504 - CG514 No. 071220359

Where beside Comet, can I obtain gas control knobs for the above hob?

Ignition won't light jets. It sparks but won't ignite . Make of oven Proline.