I assume that you’re seeing your trainee therapist in a community/vol sector service? I did this kind of placement and have worked in a complex trauma service (charity run, NHS funded), but imo if your case is as complex as you’re suggesting you perhaps shouldn’t have been allocated to a trainee? We would not have given high risk, high complexity cases to the trainee counsellors/therapists/couns psychs. Do they have any qualified therapists working for them or is their model trainees only for cost reasons?
Therapists would not do joint sessions with clinical supervisors as has been suggested. If the therapist is on a training placement, they will usually have an independent clinical supervisor outside of the service and the service ought to have a clinical lead in house who takes care of issues and allocates clients to therapists etc. It’s that person that OP needs to speak with if there’s a problem and she can’t work with the therapist allocated. Most services also will not recommend private clinicians outside the service - we were always told not to do that, as if it goes wrong you can be held liable for recommending someone.
I’m fully sympathetic to your predicament OP - NICE guidelines suggest 3-5 years therapy for complex trauma/CPTSD (assume this is what you mean by complex and you’ve had DBT but please correct me if I’m wrong) but no free services offer anywhere near it, not even where I worked which offered up to 2 years. It’s reprehensible, our mental health systems are repeatedly failing the most in need.
Unfortunately what you might be coming up against in the private sector is that there’s a huge amount of burnout in the mental health professions following Covid and many of us are having to be careful about taking on too many complex cases. I’m hearing that a lot (and am in a similar situation) and I’m turning a lot of people away just now who I know really do need help because I’m at capacity and know I don’t have the resources to see someone with high needs having gone through some of the experiences I had in practice during the pandemic times. I will, however, see complex trauma cases under normal circumstances - we do exist. I prefer a multi disciplinary team approach where possible, but I have worked with patients where this hasn’t been the case and I’ve simply ensured I’m very well supervised, by experienced supervisors confident with trauma work.
A few places you could approach for suggestions/signposting at least - difficult to provide recommendations not knowing where you’re based but these might be a start.
beaconhouse.org.uk/specialist-clinics/adult-trauma-clinic/
www.complextrauma.uk
ukpts.org