AnyVan doubled quote

Spectralis

Please can someone advise me about consumer rights regarding a removals quote?
On Sat 24th June, I provisionally booked a removal for Sat 1st July with AnyVan and was quoted £176. The confirmation email I received claimed that I could add more items up to 24 hours before the removal day.
I wasn't sure exactly how many boxes I would pack so I stated, 4 large, 4 medium and 4 small. The quote was £176.
I eventually packed 14 medium boxes, 6 small boxes, a folding camping table and two art portfolio folders. So on Thursday at 16:40pm I updated the removal items and was quoted £355! 
I was shocked so I phoned AnyVan. The call handler seemed surprised about increase too but was told by his manager that this was correct.
I looked at AnyVan's terms and conditions and found that if I cancelled with 48 hours I would only be reimbursed 50% of the fee i.e. half of £355.
I contacted another company who quoted me £167 but after I read AnyVan's T&C I realised I would end up paying over £350 anyway if I cancelled so I had to stay with AnyVan.
I'm so upset because I've had to move to temporary housing after a cancer diagnosis because my flat is no longer suitable. I've tried to organise everything properly before I begin a stem cell transplant on 3rd July but this has blown my budget. I'm very worried that AnyVan may end up charging me even more and there's nothing I can do about it. What can I do?

Risteard

Not sure I can see your point. You substantially increased the items being transported so this had a big effect on price. What is the issue?