Hi Rairai! I’m so sorry to hear about your vaginismus issues – I know how difficult they can be as a former sufferer myself.
Helen is right in that consistency is important when it comes to dilation. Also, the psychological element of vaginismus is huge. There can sometimes be a disconnect between feeling comfortable inserting a dilator yourself and being able to be penetrated by a partner. If this seems to be where the issue lies, you can try having your partner insert the dilator to practice letting go of some of the control of the situation.
If this doesn’t address your problem, give us more info and we’re happy to help!