The best solution is to finish completing all the conditions. However, you need to hire a lawyer to quash the warrant and show proof that you stayed out of trouble and complied with the conditions which should be enough to close out the case.
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Get an Oklahoma attorney--quickly.
In most places this could be cleaned up, terms are also likely to be better if it's you going in, rather than them coming after you.
There are several companies including New Beginnings Counseling, StopDUI and LRS Systems that host live VIP sessions. Budget to spend one evening and $50-70. I suggest that you go take one ASAP so that you get the certificate.
Clark County, Nevada practitioner.