Basal cell carcinoma needing MOHS

Hi I’m struggling to get my self sorted- been let down and messed about. 

4yrars sho treated it as solar keratis - burned off by nhs

15 months ago frozen by private consultant now know this is worse thing for basil cell 

3 months ago biopsy told me BCC 

Two months ago removed tumour but did not mark it and did not get it all so no idea where it still is. 

now being offered MOHs surgery on Saturday and told no reconstruction until following Wednesday- 

help not sure who to trust