Hi Mike, welcome.
Sounds like you have been through the mill. I'm sorry to hear that you are not being offered further surgery.How many times have you been treated with radiotherapy? Quite a few on this site have been irradiated more than once. I hope they come along shortly with some advice. Maybe , if the hospital you are being treated at wont do further radiation they could refer you to another centre that does. There is definitely no harm in asking / pushing your case. Now that you have the PEG fitted I hope your nutritional status improves. Get all the Ensure/Fortisip down that the Dietician recommends.
Congrats on surviving 13 years - so far.
Tammy - in Whangarei

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!