You made a complicated question. You cant have sex in any from from your end, but you want to massage only. No finger fuck or no oral sex, just massage?
When you send these type of request to an escort, I would say its too good to believe, and thats why none will fall for this. They will assume some sick pervert has some other plan in mind. Not getting respponse, I am not surprised.
You went to UK to get the service, as far as I know, people from UK dont get this service in UK, they go to Netherlands to get this service and there are plenty of specialized center for men in wheel chair or with some other bigger problems too. Anyway, I dont see why you should spend so much to get some pleasure, rather you have few other options to try out.
First would be find some Asexual who really dont like sex. Easy target would be if you see some young girls got divorced at early age, they are either suffering from asexual state or having a vaginismus. They would love you rmassage.
Second option remains as young widows who couldnot get remarried.
Third would be marry some needy girl who is from a poor family. They would bear your state as well as take care of you well.
I have no other option in mind, as you like girls parts, that why not including a dourth option of getting a male friend who would love some sucking.
I will tell a story which I mentioned before. In my neighborhood there was aman with a Govt job, he was going to marry a college teacher. 7 days before marriage when he was on shopping, he had an accident and lost both his legs. Once back from hospital, and everyone thought the marriage is off, the girl said she wants to marry him Against all odds and objection she married him, because he needs someone to take care of him more that anytime. Its 30+ years running, they are having a perfect marriage till now. He is still in wheel chair, but we love to see the couple and envy the love they have.
Its upto the girl how much she is going to go to make a marriage work, marriage is not about a dick and pussy with plenty of orgasm, its about two people care for each other and wants to spend the old age together.
Hope you will find someone like that, some day.