Price increase

I have just received an email notifying me of the price increase of Acrobat Pro from GBP 12.64 +VAT per month tp GBP 16.64 +VAT per month. I make that an increase of 32%. That would seem to me, and doubtlessly others to be an excessive increase given that in the UK inflation is running at about 11% per annum.Comments and thoughts welcome. I am an individual retired, personal subscriber but unsure whether I can sustain this payment level. A bit of a shock! I have been very reliant on the this good quality product......