Terrible Repair Job - Refusing Refund

Terrible Service - I had my Amarok break down on the 2nd March and checked my bakkie into Barons Pietermaritzburg.

After 2 whole weeks I was advised that it was the fuel pump which had been repaired and I could collect my car (me staying in JHB). Made plans to fly down and collect the car under full guarantee from Service Advisor that vehicle was sorted out.

Using the vehicle again this weekend it broke down on the way home from Pietermaritzburg with the same problem (fuel pump), this time however, leaving me stranded on the N3 and having to pay a fortune to get a tow truck to take me home all the way to JHB.

Upon advising Barons Pietermaritzburg and requesting a refund on work that was not performed properly, I have been told that they will not assist with a refund and I must send a report of the breakdown so they can advise further? So I must now pay additional repair charges and then they will decide if they are at fault???

Really ****py service guys - I won't stop on this until the right thing is done here.