Was 250 had 130 left to pay gone up now through balliff to 440

Had a fine for not paying for tv licence

thought I'd paid it all off but I hadn't

collectica are now involved

telling me I owe £440

they've passed it on to ballif as I didn't phone them before the date on the letter which came a month after the date I was to call them .

Phoned the bailiff

he wants all the money up front by end of week

my partner is blind with Tumour

I'm his carer

I explained this to him

he said he would come out and check

but wants 100 pound when he calls and then week later wants £200 week after that £140 .

I can't afford to do that

he said he can get lockSmith to change my locks to gain entry if I dont answer the door

I'm willing to pay the amount

just can't do all that amount every week

I've offered him £100 a mnth till it's paid

he was having none of it

what do I do

I'm under stress with my partner being not well

I dont want bailiffs upsetting my partner demanding money when they visit

any advise please