Got Mazda 6 ts.. had it serviced plus new battery . Car ran great loads of power and starts first turn of key . When dipping clutch to come to a hault or change to reverse it cut out and had to be restarted which it did. Yesterday it cut out as I was reversed into parking place as it always does but won’t start., I tried putting 5 litres of petrol in as the reader said 1 mile and maybe I had ran out but still won’t start ., starter is turning and engine cranking but won’t turn over attall. Any ideas