Access fees asked after the service

My husband took a car insurance with discovery telephonically after that the was no paperwork sent, when taking up the policy it was clarified that there’s no access fees to be paid hence the reason for our high premiums. So now he went to them to fix the car because it was hit in front not so huge damage,upon inspection they took the car immediately for repairs and they said we could go rent a car with Avis for seven days for 2600 which will be paid back upon return of the car, now 3 weeks the car is by the mechanic he calls to follow up on the car they say he needs to pay R15000 access fees😳 a shocker from no access fees to that amount and to access being asked upon release of the car and they even threatened if we don’t pay the money in the next 24 hours the car is gonna be put in storage that cost R150 a day which we will be liable for it. Luckily he’s boss who is white phoned and dealt with them of which they paid the car with no hustles.. of which now we’re still asking them to pay us back part of our premiums because they overcharged us.