Who can we complain to about a bad service we received from a large concern. 1 week after having a mobile service carried out when we went to turn on our gas we found that the regulator was split and our full bottle was empty. Servicer is washing their hands of the situation.
As you don't give us a lot of detail, we can only speculate about what has actually happened.
Which type and pressure was your regulator?
I'm not asking you to give us chapter and verse, and definitely do not post names or address of companies or people involved, as that would breach forum rules, but I would like to add a couple of observations that you might like to consider.
You tell us the caravan was serviced, so that tells me it is not a new caravan. but I obviously don't know how old it is, but splits in regulator diaphragms are pretty rare on young caravans so I'm guessing yours is more than 5 and probably nearer 10 years or more old
It is a fact of life that regulators can and do wear out, and it is perfectly conceivable a regulator might work a and produce an output pressure within the normal range, and then fail the next second without warning.
Fixed pressure regulators like the ones fitted to caravans cannot be adjusted or "serviced". The only checks that can be done are an external visual check, and output "operating" and "lock off" pressure checks.
Please check the details of the "service" specification you agreed with your provider, It may not be as comprehensive as think it should have been.
Unless you can prove the checks were not carried out or the service failed to detect the fault