well here is an update:
Despite the dealership telling me all sorts of stories I contacted Renault customer services to further complain about the service I was receiving from the dealership. According to Renault they thought the matter of the windscreen seal had been resolved which it had but dealership not keeping Renault informed of progress regarding rear camera. Within 30 minutes I had a call from Enterprise offering me a high spec hire car at no cost to me until a new camera had been received and fitted. This was done on 2nd January, four weeks after they first took my car in. Renault constantly kept me updated unlike the dealership. Renault also offered my £100 as compensation towards next service.
All in All not happy about service from dealership but Renault tried to make things right.