I need a plumber or experienced toilet repair specialist to repair my toilet cistern. The toilet was continuously running water into the bowl because the inlet/fill valve was not shutting off. I have dismantled the existing SIAMP fill valve while attempting to repair it. The grey lower stem is still fitted inside the cistern, and the plastic retaining nut underneath is very tight. I need someone to: - Reassemble or replace the SIAMP fill valve. - Remove the existing lower stem if necessary. - Fit a suitable replacement valve and check for leaks. - Ensure the cistern fills correctly and the water shuts off. The toilet has a compact cistern approximately 30 cm high with a bottom-entry water supply. I can provide photographs of the dismantled parts. Located in Egham, Surrey. Ideally looking for someone who can attend as soon as possible. Please quote for labour and advise whether replacement parts are included.