Go Ford yourself!

A few months ago I bought a used Ford Focus RS. The engine light came on at beginning of May and I took the car in for a service & checkup. It turns out the O2 sensors are faulty and a warranty claim was logged and approved, but Ford can only supply the part towards the end of June. All risk lies with me as the warranty discourages use of the vehicle as it may lead to more issues. Now what do I do? It's my only means of transport. Ford's inability to source vital parts in a timely fashion tenders my half a million rand car useless. This is truly the very last time I buy a Ford. From now it's a swear word in my vocab and they can go Ford themselves!! Useless brand in South Africa.