Ongoing problem with the car not starting.

Been having a problem with my car from the past 2 weeks and Volkswagen keep coming to boost the battery even after it was sent to the dealership to be told that there is nothing wrong with the battery .Now i am left with no transport and the dealership dont even commit to give me loan car as the car we are using for our daily essential .Really disapointed even after we bought the plan they still can not replace the battery .Very much disapointed in the service of VW Brits .