Very disappointing company full of deceipt - Avis employé Financial Engineer First Derivative

They delayed my grad programme start date multiple times missing out on months of potential work time. I had previously turned down other offers for this role as they assured me I would start on the promised dates. They then told me they could pay me one weeks wage and cancel the contract or wait another 6 months minimum to start work. They were very slow with information at this time. HR seems very clunky.