Capital liquids

Hellow peter I took a two years service plan with liquid capital last year January 2018. I took my car in for a service last week Friday which also includes warranty plan. I was told my service plan has terminated. When I questioned that I was asked to send proof which I did. On Monday and they send me a response that it been on review and I will be contacted. When I called to follow up I was told that it been escalated to their management. I phoned on Tuesday several times to be told the same thing. My car is ready for collection only awaiting for them to update on their side. I've been put on hold for 30minute to talk to their manager with no luck. They have been promising to call me back but they never do. I am using taxis for the whole week now. And it approaching long weekend with no car when I'm paying for it. I was told that the person to assist is on lunch. Does the lunch takes the whole week. Christian from Kia services has also been on their case trying to get them to update with no luck.If they don't sign it by 14h45 today I won't have my car for the long weekend. Please help